Design Manager

📍 Job Overview

Job Title: Design Manager

Company: DayOne

Location: Tokyo, Japan

Job Type: Full time

Category: Operations - Data Center Infrastructure Design & Management

Date Posted: 2026-10-02

Experience Level: 5-10 years

Remote Status: On-site

🚀 Role Summary

• Oversee the end-to-end design and implementation lifecycle of high-performance data center facilities, ensuring alignment with global standards and local requirements.

• Provide crucial technical leadership and expertise across all engineering disciplines involved in data center infrastructure projects, driving optimal system performance and reliability.

• Implement robust quality assurance and control processes to guarantee the accuracy, integrity, and compliance of all design documentation and executed systems.

• Proactively identify and resolve complex technical challenges and project risks throughout the design and construction phases, minimizing potential disruptions and ensuring project success.

• Manage critical vendor and supplier relationships, ensuring the selection and integration of materials and technologies that meet stringent project specifications and operational needs.

📝 Enhancement Note: This role is positioned within the critical infrastructure sector, specifically data centers, which requires a rigorous approach to design, implementation, and operational readiness. The emphasis on quality, technical leadership, and problem-solving indicates a need for a candidate with a strong operational mindset and a proven track record in managing complex, high-stakes projects.

📈 Primary Responsibilities

• Project Coordination & Integration: Collaborate closely with Project Managers, Architects, and various Engineering disciplines (e.g., Electrical, Mechanical, Structural, IT) to ensure seamless integration of all design elements into a cohesive and functional data center facility.

• Technical Design Oversight: Provide expert guidance and direct technical review for all system designs, ensuring they meet or exceed industry best practices, regulatory mandates (local and international), and specific client performance benchmarks.

• Quality Assurance & Control: Develop and enforce rigorous quality assurance protocols for design deliverables, including drawings, specifications, and technical documentation, to prevent errors and ensure adherence to DayOne’s high standards.

• Risk Management & Problem Resolution: Proactively identify potential design and implementation risks, develop mitigation strategies, and lead the resolution of technical issues that arise during the design, procurement, and construction phases.

• Vendor & Supplier Management: Engage with vendors and suppliers to define technical requirements, evaluate proposals, select appropriate materials and equipment, and ensure timely delivery and quality of procured components.

• Documentation Management: Oversee the creation, review, and approval of all design-related documentation, including detailed technical specifications, CAD drawings, BIM models, commissioning plans, and operational manuals, ensuring accuracy and completeness.

• Cross-Functional Collaboration: Foster strong working relationships and facilitate effective communication channels with internal teams (e.g., Operations, Construction, IT) and external stakeholders (e.g., clients, regulatory bodies, contractors) to ensure project alignment and success.

• Budgetary & Schedule Adherence: Support project management in adhering to design budgets and project timelines by ensuring efficient design processes and timely resolution of design-related issues.

📝 Enhancement Note: The responsibilities highlight a need for a candidate who can bridge the gap between conceptual design and operational reality. This involves not just technical acumen but also strong project management skills, vendor negotiation, and a deep understanding of how design choices directly impact long-term operational efficiency, reliability, and cost-effectiveness in a hyperscale data center environment.

🎓 Skills & Qualifications

Education: Bachelor's degree in Engineering (e.g., Electrical, Mechanical, Civil, Computer Engineering), Architecture, or a related technical field.

Experience: Minimum of 5 years of progressive industry experience, with a significant focus on data center design, critical infrastructure projects, or large-scale industrial facility development. Experience in managing complex, multi-disciplinary projects is essential.

Required Skills:

• Data Center Design Principles: In-depth knowledge of data center infrastructure, including power distribution, cooling systems (HVAC), network cabling, security systems, and building management systems (BMS).

• Project Management: Proven ability to manage complex projects from inception to completion, including scope definition, planning, execution, monitoring, and closing.

• Technical Leadership: Capacity to provide expert guidance, mentor junior engineers, and lead design reviews for critical infrastructure projects.

• Quality Assurance & Control: Experience in developing and implementing QA/QC processes for design deliverables and construction phases.

• Vendor Coordination & Procurement: Skill in specifying technical requirements, evaluating vendor proposals, and managing supplier relationships for critical equipment and services.

• Regulatory Compliance: Strong understanding of local Japanese building codes, electrical codes, safety regulations, and international data center standards (e.g., TIA-942, Uptime Institute tiers).

• Technical Documentation: Proficiency in reviewing and producing comprehensive technical specifications, drawings (CAD, BIM), and project reports.

• Problem-Solving & Analytical Skills: Ability to diagnose complex technical issues, analyze root causes, and develop effective, data-driven solutions.

• Communication & Interpersonal Skills: Excellent verbal and written communication, with the ability to articulate technical concepts clearly to diverse audiences.

• Language Proficiency: Fluency in both Japanese and English is mandatory for effective communication with internal and external stakeholders across global and local teams. Mandarin proficiency is a plus.

Preferred Skills:

• Master's degree in a relevant engineering or construction management discipline.

• Experience with hyperscale data center projects.

• Familiarity with Building Information Modeling (BIM) and advanced design software.

• Knowledge of sustainability practices and energy efficiency in data center design.

• Experience in managing design teams and external consultants.

📝 Enhancement Note: The bilingual requirement (Japanese and English) is critical for this role, underscoring the need for a candidate who can navigate cultural nuances and technical communication across different linguistic groups within a global organization operating in Japan. The emphasis on specific codes and standards suggests a need for practical, hands-on knowledge rather than purely theoretical understanding.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• Design Case Studies: Showcase 2-3 detailed case studies of complex data center or critical infrastructure projects managed, highlighting your specific role, design challenges, solutions implemented, and project outcomes.

• Technical Drawings & Specifications: Include examples of technical drawings (e.g., floor plans, schematics, wiring diagrams) and detailed technical specifications you have reviewed or developed, demonstrating an understanding of design standards and clarity.

• Quality Assurance Documentation: Present examples of QA/QC plans, checklists, or reports related to design deliverables or construction oversight, illustrating your commitment to quality and risk mitigation.

• Problem-Solving Scenarios: Briefly describe 1-2 instances where you successfully resolved significant technical design or implementation issues, detailing the problem, your analytical approach, the solution, and the positive impact on the project.

• Vendor Management Examples: Outline your approach to vendor selection and management for critical equipment (e.g., UPS systems, CRAC units, switchgear), potentially including a sample scope of work or evaluation criteria.

Process Documentation:

• Design Workflow Optimization: Be prepared to discuss your experience in optimizing design workflows, improving efficiency, and reducing design cycle times within a project management framework.

• System Integration Methodology: Describe your approach to ensuring seamless integration of various subsystems (power, cooling, IT, security) within a data center design, including coordination with different engineering disciplines.

• Performance Metrics & Reporting: Explain how you track and report on key design performance indicators and project progress, demonstrating your ability to manage design against established metrics and client expectations.

📝 Enhancement Note: For a Design Manager role, the portfolio should demonstrate not just technical design capability but also project oversight, quality control, and the ability to manage complex interdependencies. The emphasis on process documentation points to an expectation that candidates can articulate and improve the operational aspects of the design lifecycle itself.

💵 Compensation & Benefits

Salary Range: Given the specialized nature of data center design management, the significant experience required (5-10 years), and the high cost of living in Tokyo, a competitive salary range is estimated to be between ¥12,000,000 and ¥18,000,000 JPY annually. This estimate is based on industry benchmarks for similar roles in major metropolitan areas in Japan, considering the seniority and technical expertise required.

Benefits:

• Comprehensive Health Insurance: Coverage for medical, dental, and vision care, often including family coverage options.

• Retirement Savings Plan: Contribution matching or defined benefit plans to support long-term financial security.

• Paid Time Off: Generous vacation days, sick leave, and public holidays, with potential for additional leave based on tenure.

• Professional Development: Opportunities for continued education, certifications (e.g., PMP, LEED AP, specific vendor certifications), and attendance at industry conferences.

• Performance Bonuses: Annual bonus structures tied to individual and company performance, reflecting contributions to project success and company growth.

• Commuting Allowance: Support for transportation costs to the office.

• Potential for Stock Options: For key employees in a rapidly growing company, stock options may be offered as part of the compensation package.

Working Hours: Standard full-time working hours are typically 40 hours per week, with potential for overtime depending on project demands and critical deadlines. The role is on-site, requiring regular presence at the Tokyo office and potentially project sites.

📝 Enhancement Note: The salary estimate is derived from research on engineering and management roles in the data center and critical infrastructure sectors in Tokyo, factoring in the specified experience level and the demanding nature of the role. Benefits are standard for senior positions in multinational corporations operating in Japan, with a focus on long-term employee well-being and professional growth.

🎯 Team & Company Context

🏢 Company Culture

Industry: Data Center Infrastructure Development & Operations. DayOne operates in a rapidly growing, capital-intensive sector crucial for the digital economy, providing high-performance, reliable infrastructure for hyperscale cloud providers, enterprises, and technology companies.

Company Size: DayOne is a rapidly growing global company, indicated by its Series C funding and operations across seven countries. This suggests a dynamic environment with significant expansion plans, likely employing several hundred to a few thousand employees worldwide, with a growing team in Japan.

Founded: While the founding date isn't explicitly stated, the mention of significant Series C funding implies a company that has established a strong track record and is in a mature growth phase, likely founded within the last 5-10 years to achieve its current scale.

Team Structure:

• Global & Local Integration: The Design Manager will be part of a growing Japanese team while also being connected to DayOne's global engineering and design standards.

• Cross-Functional Collaboration: The role requires close collaboration with Project Management, Construction, Operations, IT, and potentially Sales/Business Development teams.

• Reporting Hierarchy: Likely reports to a senior engineering or construction director, with oversight of internal design engineers and external consultants/contractors.

Methodology:

• Data-Driven Design: Emphasis on using data and analytics to inform design decisions, optimize performance, and ensure reliability.

• Process Standardization: Development and adherence to standardized design processes and quality controls to ensure consistency across projects and regions.

• Agile Project Execution: While infrastructure projects can be lengthy, there's likely an adoption of agile principles for task management and problem-solving to maintain project momentum.

Company Website: [DayOne Website - e.g., https://www.day-one.us/ (or specific regional site if available)]

📝 Enhancement Note: DayOne's focus on "precision and reliability" and building for the "long term" suggests a culture that values meticulous execution, engineering excellence, and sustainable growth. The expansion into Japan signifies a commitment to mastering complex local markets and building a robust, enduring presence.

📈 Career & Growth Analysis

Operations Career Level: This role is a mid-to-senior level management position. It requires a blend of deep technical expertise in data center design and proven project/people management skills. The Design Manager is expected to lead design initiatives, influence technical direction, and ensure projects meet stringent operational requirements.

Reporting Structure: The Design Manager will likely report to a Director of Engineering, Head of Design, or a senior Project Director within the Japanese or APAC region. They will manage a team of internal engineers and external consultants, acting as the primary technical point of contact for design-related matters.

Operations Impact: The Design Manager has a profound impact on DayOne's operational success. Their design decisions directly influence the facility's:

• Reliability & Uptime: Ensuring robust power, cooling, and network infrastructure minimizes downtime risks.

• Efficiency & Cost: Optimizing energy consumption, cooling efficiency, and space utilization impacts operational expenditures (OPEX).

• Scalability & Future-Proofing: Designing for future capacity needs and technological advancements ensures long-term viability and reduces future upgrade costs.

• Safety & Compliance: Adhering to all regulations ensures safe operations and avoids legal penalties.

Growth Opportunities:

• Senior Leadership: Potential to advance to roles such as Head of Design, Director of Engineering, or VP of Infrastructure, overseeing larger programs or multiple regions.

• Specialization: Deepen expertise in specific areas like hyperscale facility design, advanced cooling technologies, or sustainable data center practices.

• International Mobility: Opportunities to contribute to DayOne's expansion in other global markets, leveraging experience gained in Japan.

• Mentorship & Training: Develop leadership skills by mentoring junior engineers and leading cross-functional teams, contributing to DayOne's talent development initiatives.

📝 Enhancement Note: The career path for a Design Manager in this sector is typically one of increasing responsibility, scope, and strategic influence. DayOne's rapid growth and international presence offer significant opportunities for individuals who can demonstrate leadership, technical mastery, and a commitment to operational excellence.

🌐 Work Environment

Office Type: The role is based in DayOne's corporate office in Tokyo. This environment is likely modern, professional, and designed to support collaboration among global and local teams. It will serve as the hub for strategic planning, project coordination, and administrative functions.

Office Location(s): Corporate Office-Tokyo, Japan. Specific details regarding the office address, accessibility via public transport, and proximity to business districts would be beneficial for candidates.

Workspace Context:

• Collaborative Spaces: The office will likely feature meeting rooms equipped with AV technology for virtual and in-person collaboration, open work areas to foster interaction, and potentially quiet zones for focused work.

• Technology Integration: Access to advanced design software, project management tools, and communication platforms essential for managing complex international projects.

• Team Interaction: Opportunities to engage with a diverse team of engineers, project managers, and business professionals, fostering a dynamic and intellectually stimulating work environment.

Work Schedule: The standard work schedule is on-site, 40 hours per week. While a structured workweek is expected, the demanding nature of data center projects may necessitate flexibility, occasional extended hours, and potential site visits to construction locations to ensure design integrity and address on-site challenges.

📝 Enhancement Note: The on-site requirement in Tokyo indicates a need for candidates who are either local or willing to relocate. The emphasis on collaboration suggests an environment where team input and cross-functional communication are highly valued, which is critical for successful infrastructure project delivery.

📄 Application & Portfolio Review Process

Interview Process:

• Initial Screening: HR or a recruiter will likely conduct an initial call to assess basic qualifications, language proficiency, and cultural fit.

• Hiring Manager Interview: A detailed discussion with the hiring manager (likely a senior engineering or design leader) to evaluate technical expertise, project management experience, and leadership capabilities. Be prepared to discuss your portfolio in depth.

• Technical Assessment/Case Study: You may be presented with a hypothetical data center design challenge or asked to elaborate on a specific case study from your portfolio, focusing on problem-solving, design choices, and justification.

• Team/Cross-Functional Interviews: Interviews with key stakeholders from Operations, Construction, or Project Management teams to assess collaboration skills and understanding of end-to-end project delivery.

• Final Interview: Potentially with a senior executive to discuss strategic alignment, career aspirations, and overall fit within DayOne's culture.

Portfolio Review Tips:

• Curate Strategically: Select projects that best showcase your responsibilities as a Design Manager, focusing on complexity, scale, and successful outcomes. Prioritize data center or critical infrastructure projects.

• Quantify Impact: Wherever possible, use metrics to demonstrate the success of your designs and project management efforts (e.g., % reduction in energy consumption, % improvement in uptime, adherence to budget/schedule).

• Structure Your Narratives: For each case study, clearly outline the challenge, your role and approach, the solutions implemented, and the results achieved. Use the STAR method (Situation, Task, Action, Result).

• Highlight Bilingual Capability: If showcasing projects involving international collaboration, explicitly mention how you navigated language and cultural differences to achieve successful outcomes.

• Be Ready to Discuss Processes: Prepare to articulate your methodologies for design review, quality assurance, vendor management, and risk mitigation.

Challenge Preparation:

• Data Center Fundamentals: Brush up on core data center design principles, common challenges (e.g., heat dissipation, power redundancy), and emerging technologies.

• Problem-Solving Framework: Practice breaking down complex problems into manageable components and applying a logical, data-driven approach to finding solutions.

• Stakeholder Communication: Prepare to explain technical concepts clearly and concisely to both technical and non-technical audiences. Practice articulating the business impact of design decisions.

📝 Enhancement Note: The interview process is designed to rigorously assess both technical proficiency and the ability to manage complex projects and teams in a high-stakes environment. A well-prepared portfolio that clearly demonstrates leadership, problem-solving, and bilingual communication skills will be crucial for success.

🛠 Tools & Technology Stack

Primary Tools:

• CAD Software: AutoCAD, Revit (for BIM), or similar architectural and engineering design software.

• BIM Software: Proficiency in Building Information Modeling tools is highly valuable for integrated design and clash detection.

• Project Management Software: Tools like Microsoft Project, Asana, Jira, or proprietary systems for tracking project timelines, tasks, and resources.

• Collaboration Platforms: Microsoft Teams, Slack, Zoom, or similar for real-time communication and virtual meetings.

Analytics & Reporting:

• Data Analysis Tools: Excel (advanced functions), potentially BI tools like Tableau or Power BI for analyzing design performance data and project metrics.

• Simulation Software: Experience with computational fluid dynamics (CFD) for thermal analysis or power simulation tools may be beneficial for advanced design optimization.

CRM & Automation:

• While not directly customer-facing, understanding how design decisions impact operational systems (often managed via CRM-adjacent platforms or dedicated DCIM - Data Center Infrastructure Management) is key. Familiarity with systems that manage facility assets and performance data is advantageous.

• Document Management Systems: SharePoint, Google Drive, or specialized document control systems for managing extensive design documentation.

📝 Enhancement Note: A Design Manager needs to be proficient not only in design-specific software but also in tools that facilitate project management, collaboration, and data analysis. Familiarity with systems that support operational oversight (like DCIM) demonstrates an understanding of the full lifecycle impact of design choices.

👥 Team Culture & Values

Operations Values:

• Excellence & Precision: A deep commitment to engineering accuracy, meticulous planning, and flawless execution in all design and implementation phases.

• Reliability & Uptime: Prioritizing the creation of robust, resilient infrastructure that ensures maximum availability and minimizes operational risks.

• Long-Term Vision: Building for scalability, sustainability, and future technological advancements, reflecting a commitment to enduring infrastructure solutions.

• Innovation & Continuous Improvement: Encouraging the adoption of new technologies and methodologies to enhance design efficiency, performance, and sustainability.

• Collaboration & Teamwork: Fostering a supportive environment where diverse teams work together effectively, sharing knowledge and expertise to achieve common goals.

Collaboration Style:

• Cross-Functional Integration: Proactive engagement with Operations, Construction, IT, and other departments to ensure designs are practical, buildable, and meet operational needs from the outset.

• Open Communication: Encouraging transparent and timely information sharing, feedback loops, and constructive debate among team members and stakeholders.

• Knowledge Sharing: Establishing mechanisms for sharing best practices, lessons learned, and technical insights across projects and teams to drive collective learning and improvement.

📝 Enhancement Note: DayOne's stated values of "precision and reliability" and building for the "long term" strongly suggest a company culture that rewards meticulous work, engineering rigor, and strategic foresight. The emphasis on bilingual communication and global operations implies a value placed on inclusivity and effective cross-cultural teamwork.

⚡ Challenges & Growth Opportunities

Challenges:

• Navigating Local Regulations & Standards: Ensuring strict adherence to diverse and evolving Japanese building codes, safety regulations, and specific client requirements while integrating global design standards.

• Managing Complex Stakeholder Expectations: Balancing the needs and priorities of various internal departments (e.g., Operations, Construction), external clients, vendors, and regulatory bodies.

• Integrating New Technologies: Staying abreast of and effectively incorporating cutting-edge data center technologies (e.g., advanced cooling, AI-driven infrastructure management) into designs while ensuring reliability and compatibility.

• Talent Acquisition & Retention: Building and maintaining a high-performing design team in a competitive market, particularly for specialized roles requiring bilingual proficiency.

Learning & Development Opportunities:

• Advanced Certifications: Opportunities to pursue industry-recognized certifications such as PMP (Project Management Professional), LEED AP (for sustainable design), or specific vendor certifications for critical infrastructure equipment.

• Exposure to Global Projects: Gaining experience on diverse international projects, understanding different market requirements and operational nuances.

• Leadership Development Programs: Formal training and mentorship to enhance leadership, strategic thinking, and people management skills.

• Industry Conferences & Workshops: Participation in leading data center and infrastructure industry events to stay updated on trends, network with peers, and discover innovative solutions.

📝 Enhancement Note: The challenges inherent in this role are significant but also present excellent opportunities for professional growth. Successfully navigating complex regulatory environments and managing diverse stakeholders will hone a candidate's strategic and problem-solving capabilities.

💡 Interview Preparation

Strategy Questions:

• "Describe a complex data center design project you managed. What were the key challenges, how did you address them, and what was the outcome?" (Focus on your role, decision-making process, and quantifiable results.)

• "How do you ensure that designs meet both client specifications and long-term operational efficiency goals?" (Highlight your understanding of the OPEX impact of CAPEX decisions.)

• "Walk me through your process for selecting and managing critical vendors for data center infrastructure components." (Emphasize your technical evaluation, negotiation, and quality assurance strategies.)

• "How do you manage design conflicts or disagreements between different engineering disciplines or stakeholders?" (Showcase your conflict resolution and negotiation skills.) Company & Culture Questions:

• "What do you know about DayOne's presence and projects in Japan, and why are you interested in this specific opportunity?" (Demonstrate thorough research and genuine interest in the company's mission.)

• "How do you see your skills and experience contributing to DayOne's goal of building reliable, long-term data infrastructure?" (Align your capabilities with the company's core values.)

• "Describe your experience working in a multicultural or multinational team. How do you ensure effective communication and collaboration across different languages and cultures?" (Prepare specific examples of navigating bilingual/multicultural environments.) Portfolio Presentation Strategy:

• Storytelling: Frame your portfolio projects as compelling narratives, clearly articulating the problem, your solution, and the impact.

• Visual Aids: Use concise slides with key visuals (diagrams, charts, photos if appropriate) to illustrate your points, rather than dense text.

• Focus on Management: Emphasize your role in managing the design process, teams, and stakeholders, not just technical details.

• Quantify Achievements: Be prepared to cite specific metrics related to cost savings, efficiency gains, schedule adherence, or risk reduction.

• Interactive Q&A: Be ready for in-depth questions about your design choices, methodologies, and decision-making rationale.

📝 Enhancement Note: Interview preparation for this role requires a strong emphasis on demonstrating both technical command and leadership acumen. Preparing specific examples that highlight your bilingual capabilities and understanding of operational impact will be key differentiators.

📌 Application Steps

To apply for this Design Manager position:

• Submit your application through the provided Workday link: https://dayone.wd102.myworkdayjobs.com/external/job/Tokyo/Design-Manager_JR3026

• Customize Your Resume: Tailor your resume to highlight experience in data center design, project management, technical leadership, and bilingual communication (Japanese/English). Use keywords from the job description and ensure achievements are quantified.

• Prepare Your Portfolio: Curate a concise portfolio showcasing 2-3 relevant data center or critical infrastructure projects. Focus on your management responsibilities, design challenges overcome, and project outcomes. Be ready to present key pieces virtually or in person.

• Research DayOne: Thoroughly understand DayOne's mission, projects in Japan (e.g., Fuchu Intelligent Park), company values, and recent funding news. Prepare to articulate how your background aligns with their strategic goals.

• Practice Interview Responses: Rehearse answers to common interview questions, particularly those focusing on technical problem-solving, project management, stakeholder collaboration, and your experience in a bilingual, multicultural setting.

⚠️ Important Notice: This enhanced job description includes AI-generated insights and operations industry-standard assumptions. All details should be verified directly with the hiring organization before making application decisions.