Senior Prototyping Engineer, Amazon Leo OISL

📍 Job Overview

Job Title: Senior Prototyping Engineer, Amazon Leo OISL

Company: Amazon

Location: Northridge, California, United States

Job Type: Full-Time

Category: Manufacturing Engineering / Operations

Date Posted: 2026-09-24

Experience Level: Senior (10+ years)

Remote Status: On-site

🚀 Role Summary

• Lead advanced prototype manufacturing within a state-of-the-art machine shop, focusing on complex aerospace components for Amazon's low Earth orbit satellite network (Amazon Leo).

• Define and standardize machining strategies, processes, and quality standards for multi-axis CNC equipment, ensuring high-volume throughput and reliability.

• Drive early-stage collaboration with design engineering to influence hardware design for manufacturability, cost-effectiveness, and schedule adherence.

• Provide technical leadership and mentorship to a team of machinists and prototyping engineers, elevating the overall technical capability of the Prototyping and Integration (PI) Team.

• Spearhead continuous improvement initiatives to optimize machining operations, reduce cycle times, and enhance overall operational efficiency.

📝 Enhancement Note: This role is highly specialized within aerospace manufacturing and prototyping, requiring a deep blend of hands-on technical expertise in advanced CNC machining and strategic process leadership. The focus on "first-of-their-kind" parts and influencing design early highlights a critical GTM and product development support function.

📈 Primary Responsibilities

• End-to-End Prototype Ownership: Take full responsibility for the most complex and highest-risk aerospace prototype builds, from initial concept and programming through setup and final production on multi-axis mills, lathes, and mill-turn equipment.

• Machining Strategy Definition: Develop and document the lab's advanced machining strategy, including CAM approaches, fixturing philosophy, and process sequencing, ensuring scalability and repeatability across the team.

• Design for Manufacturability (DFM) Influence: Proactively engage with design engineering teams during the early design stages to provide critical feedback on manufacturability, cost, and schedule, thereby influencing design decisions before finalization.

• Process Standardization and Improvement: Establish and enforce shop-wide machining quality and throughput standards. Lead and manage continuous improvement projects aimed at measurably increasing throughput and reducing manufacturing cycle times.

• Technical Leadership & Mentorship: Provide expert technical guidance and mentorship to machinists and other prototyping engineers, fostering a culture of skill development and knowledge sharing to enhance team capabilities.

• Ambiguity Management & Decision Making: Exercise independent technical judgment to make critical decisions on ambiguous, novel parts, effectively balancing risks, costs, quality, and program schedules across multiple concurrent projects.

• Quality Issue Resolution: Investigate and troubleshoot complex quality issues, driving corrective actions to root cause and implementing sustainable process fixes to prevent recurrence.

📝 Enhancement Note: The emphasis on "owning the most complex, highest-risk aerospace builds end-to-end" and "defining the lab's advanced machining strategy" indicates a leadership role that requires not just execution but also strategic foresight and process architecture within the prototyping function.

🎓 Skills & Qualifications

Education:

• Bachelor's degree in Mechanical Engineering, Aerospace Engineering, Manufacturing Engineering, or a closely related field. Experience:

• A minimum of 10 years of hands-on machine shop experience, specifically operating complex CNC equipment for precision aerospace, defense, or other high-reliability hardware manufacturing.

• Proven track record of at least 4 years overseeing continuous improvement initiatives, including establishing new processes and demonstrating full ownership through to successful conclusion.

• Experience serving as a mentor, technical lead, or in a leadership capacity for an engineering team. Required Skills:

• Expert-level CNC Machining: Proficient operation of complex multi-axis (5-axis and mill-turn) CNC equipment.

• Advanced CAM Programming: Expert knowledge of HyperMILL, ESPRIT, or equivalent CAM systems, with a strong ability to program complex geometry.

• Geometric Dimensioning and Tolerancing (GD&T): Expert understanding and application of GD&T principles for precision manufacturing.

• Process Ownership & Improvement: Demonstrated ability to lead and implement continuous improvement initiatives, showing tangible results in efficiency and throughput.

• Technical Leadership: Experience in mentoring junior engineers and leading technical discussions or projects.

• Visual Inspection: Ability to perform detailed visual inspections of precision optical and mechanical components.

• Physical Capability: Must be able to frequently move lab equipment and materials weighing up to 40 pounds.

Preferred Skills:

• Advanced CAD Proficiency: Expert experience using Siemens NX, or other CAD systems, including model modification and design of fixtures/tooling.

• Manufacturing Process Expertise: Deep knowledge of finishing processes such as coatings and heat treating, and the ability to integrate these into manufacturing process routings.

• First-of-Kind Part Strategy: Experience defining machining strategies and fixturing philosophies for unique, one-off prototype parts where no established process exists.

• Design for Manufacturability (DFM) Collaboration: Demonstrated success in upstream collaboration with design engineering to influence hardware design decisions.

• Process Control System Development: Experience establishing machine shop documentation, standards, or process control systems from inception.

• Communication & Influence: Strong verbal and written communication skills, with the ability to influence cross-functional teams and represent the prototyping function to leadership.

📝 Enhancement Note: The "10+ years" experience requirement, coupled with "expert-level" knowledge in specific CAM systems and GD&T, positions this as a highly specialized senior role. The emphasis on influencing design and establishing processes points towards a need for strategic thinking beyond just machine operation.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• Case Studies in Complex Machining: Showcase detailed case studies of your most challenging aerospace prototype builds, highlighting the complexity of geometry, materials, and tight tolerances achieved.

• Process Optimization Examples: Include examples of implemented continuous improvement initiatives, clearly demonstrating the problem, your proposed solutions, the implementation steps, and quantifiable results (e.g., reduced cycle time, increased throughput, improved yield).

• DFM Engagement Documentation: Provide evidence or descriptions of how you've collaborated with design engineering to influence designs for manufacturability, including specific examples of design changes you advocated for and their impact.

• Strategy and Standards Development: Document instances where you have defined or standardized machining strategies, fixturing philosophies, or process controls for a machine shop environment.

Process Documentation:

• Workflow Design & Optimization: Illustrate your approach to designing and optimizing complex manufacturing workflows for novel aerospace components, detailing how you sequence operations for efficiency and quality.

• System Implementation & Automation: Showcase experience with implementing new machining technologies, software (CAM/CAD), or process improvements that enhance automation or reduce manual intervention.

• Measurement & Performance Analysis: Demonstrate how you define, track, and analyze key performance indicators (KPIs) related to machining operations, such as cycle time, uptime, scrap rates, and adherence to specifications.

📝 Enhancement Note: For a role of this seniority and technical depth, a portfolio is crucial. It should not just list skills but visually and narratively demonstrate problem-solving, strategic thinking, and quantifiable impact on manufacturing processes and outcomes, particularly for complex aerospace parts.

💵 Compensation & Benefits

Salary Range:

• The base salary range for this position is $136,900 - $185,200 USD annually.

• 📝 Enhancement Note: This salary range is based on the provided data for USA, CA, NORTHRIDGE. It reflects a senior-level engineering position in a high-cost-of-living area with significant specialized technical expertise required. Amazon's compensation often includes a total package, so this range represents the base salary component.

Benefits:

• Comprehensive Health Coverage: Medical, Dental, and Vision insurance, including prescription coverage.

• Life and Disability: Basic Life & AD&D Insurance with options for Supplemental Life plans.

• Well-being Support: Employee Assistance Program (EAP), Mental Health Support, and a Medical Advice Line.

• Financial Planning: Flexible Spending Accounts (FSAs) and 401(k) with employer matching.

• Family Support: Adoption and Surrogacy Reimbursement coverage.

• Time Off: Generous Paid Time Off (PTO) and Parental Leave.

• Equity and Bonuses: Sign-On Payments and Restricted Stock Units (RSUs), which are significant components of Amazon's total compensation.

Working Hours:

• Standard work hours are typically 40 hours per week.

• 📝 Enhancement Note: While a standard 40-hour week is listed, the nature of aerospace prototyping and critical project deadlines may necessitate flexibility and occasional overtime to meet program demands.

🎯 Team & Company Context

🏢 Company Culture

Industry: E-commerce, Cloud Computing, Satellite Communications, Aerospace Technology. Amazon operates at the forefront of multiple cutting-edge industries, with Amazon Leo focusing on expanding global internet access through advanced satellite technology.

Company Size: Amazon is a global technology giant, employing over 1.5 million people worldwide. This immense scale means access to vast resources, diverse expertise, and opportunities for innovation, but also requires navigating complex organizational structures.

Founded: 1994. Amazon's long history is marked by a relentless focus on customer obsession, innovation, and operational excellence, which permeates all its divisions, including advanced technology projects like Amazon Leo.

Team Structure:

• Prototyping and Integration (PI) Team: This specialized team is part of the Optical Intersatellite Link (OISL) organization.

• Service Areas: The PI team's services encompass Hardware Fabrication, Electrical Integration, Electromechanical Hardware Development, DVT (Design Verification Testing) and Qualification Testing, and Quality Assurance.

• Cross-functional Collaboration: The role emphasizes close partnership with design engineering and other manufacturing and testing functions, requiring strong communication and collaboration skills to integrate hardware development seamlessly.

Methodology:

• Rapid Prototyping: The team's core function is to accelerate hardware development through rapid manufacturing of novel components.

• Data-Driven Learning: Learnings from prototyping and testing are directly applied to scale aerospace manufacturing processes and reduce program risks.

• Continuous Improvement: A culture of ongoing enhancement of processes and operational efficiency is expected.

Company Website: https://www.amazon.com

📝 Enhancement Note: Amazon's culture is known for its "Day 1" mentality, emphasizing long-term vision, customer obsession, and a fast-paced, innovative environment. For this role, it translates to working on a groundbreaking project with high stakes and the need for rapid iteration and problem-solving.

📈 Career & Growth Analysis

Operations Career Level: This role is classified as a Senior Engineer, indicating a high level of technical expertise, experience, and the capacity for leadership and strategic input. It's a key individual contributor role with significant influence on team processes and project outcomes.

Reporting Structure: While not explicitly detailed, a Senior Prototyping Engineer would typically report to an Engineering Manager or Technical Lead within the Prototyping and Integration Team. They are expected to provide technical direction and mentorship to more junior team members.

Operations Impact: The Prototyping and Integration Team plays a critical role in the success of Amazon Leo by ensuring that novel hardware can be rapidly fabricated, tested, and iterated upon. This direct support for hardware development is essential for reducing program risk, accelerating time-to-market, and ultimately enabling the delivery of broadband connectivity. The Senior Prototyping Engineer's work directly impacts the feasibility, quality, and speed of bringing new satellite technologies to fruition.

Growth Opportunities:

• Technical Specialization: Deepen expertise in advanced CNC machining, aerospace manufacturing, and specific CAM/CAD software, becoming a recognized subject matter expert within Amazon.

• Process Leadership: Transition into roles focused on establishing and managing broader manufacturing processes, quality systems, or R&D operations for new Amazon initiatives.

• Team Leadership: Progress into formal management roles, leading teams of engineers and technicians, or taking on program management responsibilities for critical hardware development projects.

• Cross-Functional Mobility: Leverage experience in a high-impact, cutting-edge project to move into related fields within Amazon, such as production engineering, advanced manufacturing, or systems engineering for satellite networks.

📝 Enhancement Note: The "Senior" title combined with responsibilities like defining strategy and leading improvements suggests a clear path for individuals who excel in both hands-on technical execution and process-oriented leadership within a high-tech manufacturing environment.

🌐 Work Environment

Office Type: This is an on-site role, heavily focused on hands-on work within a machine shop environment. It also involves significant collaboration with design and engineering teams, likely in office or lab settings.

Office Location(s): Northridge, California, USA. This location is within the greater Los Angeles area, known for its aerospace industry presence.

Workspace Context:

• Machine Shop Environment: The primary workspace will be a machine shop equipped with advanced multi-axis CNC mills, lathes, and mill-turn equipment. This involves working with machinery, tooling, and raw materials.

• Collaborative Spaces: Interaction with design engineers, manufacturing engineers, and other prototyping team members will occur in shared workspaces, meeting rooms, and potentially lab areas for integration and testing.

• Tools and Technology: Access to high-end CAM software (HyperMILL, ESPRIT), CAD software (Siemens NX), precision measurement tools, and potentially advanced metrology equipment.

Work Schedule: The role is full-time, typically 40 hours per week. However, the dynamic nature of aerospace prototyping and critical project deadlines may require flexibility and occasional extended hours to ensure timely delivery of hardware.

📝 Enhancement Note: The environment is a blend of demanding, hands-on shop floor work and collaborative engineering office interactions. Candidates should be comfortable in both settings and understand the pressures associated with rapid hardware development cycles.

📄 Application & Portfolio Review Process

Interview Process:

• Initial Screening: A recruiter will likely conduct an initial phone screen to assess basic qualifications, experience alignment, and interest in the role and Amazon

Leo.

• Technical Interview(s): Expect multiple rounds of interviews focused on deep technical expertise. These may include:

  • Hands-on Machining & CAM: Detailed questions and scenario-based problems related to CNC programming, multi-axis machining techniques, fixturing strategies, and CAM software application.
  • GD&T and Metrology: Assessment of your understanding and application of GD&T for complex assemblies and your ability to interpret intricate prints.
  • Process & Improvement: Scenarios requiring you to define processes, troubleshoot quality issues, or propose continuous improvement strategies for a machine shop.
  • DFM and Design Collaboration: Hypothetical situations where you'd need to influence design engineers for better manufacturability.

• Leadership & Mentorship Interview: Evaluation of your ability to lead through influence, mentor junior colleagues, and manage competing priorities.

• Behavioral Interviews: Standard Amazon Leadership Principles (LP) questions assessing how you handle ambiguity, ownership, bias for action, and other core Amazon values.

• On-site/Virtual Tour & Final Panel: Potentially a visit to the facility (or a detailed virtual tour) and a final panel interview with senior team members or managers.

Portfolio Review Tips:

• Showcase Complexity: Prioritize projects involving the most intricate geometries, challenging materials, and tightest tolerances, especially in aerospace contexts.

• Quantify Impact: For every project or initiative, clearly state the problem, your solution, the steps taken, and the quantifiable results (e.g., "Reduced cycle time by 15%", "Achieved +/- 0.0005" tolerance on critical feature", "Influenced design to eliminate 2 machining operations").

• Demonstrate Process Ownership: Highlight examples where you've not just executed but defined, documented, and improved processes. This could include new CAM strategies, fixturing systems, or quality control procedures.

• Highlight DFM Collaboration: If possible, include examples of your input into the design process and how it led to better manufacturability or cost savings.

• Structure for Clarity: Organize your portfolio logically, perhaps by project type or skill area, with clear headings, concise descriptions, and high-quality visuals (CAD renderings, photos of parts, diagrams).

Challenge Preparation:

• Process Design Challenge: Be prepared to outline a process for manufacturing a hypothetical complex part, including machine selection, tooling, CAM strategy, fixturing, and quality checks.

• Troubleshooting Scenario: You might be presented with a quality issue (e.g., a part not meeting spec) and asked to diagnose the root cause and propose corrective actions.

• DFM Discussion: Be ready to discuss how you would approach a design review for a new component to ensure it's optimized for your shop's capabilities.

• Leadership/Mentorship Scenario: Prepare to discuss how you would mentor a junior machinist on a complex operation or resolve a conflict within the team.

📝 Enhancement Note: Amazon's interview process is rigorous and heavily focused on demonstrating specific skills and alignment with their Leadership Principles. For this role, the portfolio and technical problem-solving aspects will be paramount.

🛠 Tools & Technology Stack

Primary Tools:

• Advanced CNC Machinery: Multi-axis (5-axis, mill-turn) CNC mills and lathes are the core equipment.

• CAM Software: Expert proficiency required in HyperMILL, ESPRIT, or comparable advanced CAM systems for complex 3D machining.

• CAD Software: Strong working knowledge of Siemens NX or similar CAD systems for model manipulation and fixture/tooling design.

• Precision Measurement Instruments: Experience with CMMs, micrometers, calipers, and other metrology tools for quality inspection.

Analytics & Reporting:

• Manufacturing Execution Systems (MES): Potentially used for shop floor data collection, scheduling, and real-time production monitoring, though not explicitly mentioned.

• Data Analysis Tools: While not specified, proficiency in analyzing manufacturing data (cycle times, yields, defect rates) using tools like Excel, SQL, or specialized analytics platforms is beneficial for continuous improvement.

CRM & Automation:

• ERP/MRP Systems: Familiarity with enterprise resource planning or material requirements planning systems for managing materials and production schedules may be advantageous.

• Process Automation: Understanding of how to automate workflows within CAM software or through scripting can be a plus.

• Integration: Experience with how CAM/CAD systems integrate with other PLM (Product Lifecycle Management) or ERP systems would be valuable.

📝 Enhancement Note: The emphasis is heavily on CAD/CAM software and CNC machinery. While broader systems knowledge is helpful, deep expertise in the specified programming and machining tools is non-negotiable.

👥 Team Culture & Values

Operations Values:

• Customer Obsession: While not directly customer-facing, the team's work directly supports the mission of delivering connectivity, making them critical to Amazon's customer-centric approach. Every part produced must meet stringent quality standards for this ultimate goal.

• Bias for Action: The fast-paced nature of prototyping requires quick decision-making and execution. Engineers are expected to act decisively, even with incomplete information, and iterate rapidly.

• Ownership: Taking full responsibility for complex builds, from programming to delivery, and for the success of improvement initiatives.

• Invent and Simplify: Developing novel machining strategies and processes for first-of-their-kind parts, finding efficient and elegant solutions to complex manufacturing challenges.

• Learn and Be Curious: Continuously exploring new machining techniques, materials, and technologies to stay at the forefront of prototyping capabilities.

Collaboration Style:

• Cross-Functional Integration: The role demands close collaboration with design engineers, manufacturing engineers, and quality assurance teams. Open communication and a partnership approach are key.

• Technical Mentorship: A culture of knowledge sharing where senior engineers actively mentor and develop the skills of their colleagues.

• Process Feedback Loops: Encouraging feedback on designs and processes to drive continuous improvement and ensure the best outcomes for the hardware development lifecycle.

📝 Enhancement Note: Amazon's Leadership Principles are deeply embedded in its culture. Candidates should be prepared to demonstrate how their work and interactions align with these principles, particularly Ownership, Bias for Action, and Invent and Simplify, within the context of advanced manufacturing.

⚡ Challenges & Growth Opportunities

Challenges:

• Manufacturing Novelty: Working with "first-of-their-kind" parts with no established manufacturing processes requires significant ingenuity, risk assessment, and iterative problem-solving.

• Extreme Precision Requirements: Meeting the stringent tolerances and quality standards for aerospace components, especially for satellite communication, presents a constant challenge in machining and inspection.

• Balancing Speed and Quality: The need for rapid prototyping must be balanced with the absolute requirement for high quality and reliability, demanding efficient workflows and precise execution.

• Leading Through Influence: As a senior individual contributor, influencing design decisions and driving process changes among peers and cross-functional teams requires strong communication and technical credibility.

Learning & Development Opportunities:

• Advanced Machining Techniques: Exposure to cutting-edge multi-axis machining, exotic materials, and advanced fixturing for aerospace applications.

• Industry Best Practices: Gaining insights into the manufacturing processes and quality standards of a leading aerospace and technology company.

• Process Engineering Skills: Developing expertise in process definition, documentation, and continuous improvement methodologies specific to high-tech manufacturing.

• Leadership Development: Opportunities to hone technical leadership, mentorship, and project management skills through leading complex projects and initiatives.

• Exposure to Satellite Technology: Deepening understanding of the broader Amazon Leo project and its role in global connectivity.

📝 Enhancement Note: This role offers a unique opportunity to work on a highly visible, impactful project at the cutting edge of technology, providing significant challenges that translate into substantial professional growth and learning.

💡 Interview Preparation

Strategy Questions:

• "Describe a time you had to machine a part with extremely tight tolerances. What was your approach, and how did you ensure accuracy?" (Assesses GD&T, precision machining, and quality control.)

• "Walk me through your process for defining the machining strategy for a complex, novel aerospace component with no prior manufacturing history." (Evaluates strategy definition, CAM/fixturing expertise, and risk management.)

• "How have you successfully influenced a design engineer to change a design for better manufacturability? What was the outcome?" (Tests DFM collaboration and influencing skills.)

• "Describe a continuous improvement initiative you led in a machine shop. What was the problem, your solution, and the measurable results?" (Assesses process ownership, problem-solving, and impact demonstration.) Company & Culture Questions:

• "Why are you interested in working on Amazon Leo and contributing to satellite internet technology?" (Assesses alignment with company mission and role.)

• "How do you handle ambiguity and make technical decisions when dealing with first-of-their-kind parts?" (Tests problem-solving in uncertain environments, relevant to Amazon's LP "Invent and Simplify".)

• "Describe your experience mentoring junior machinists or engineers. How do you help them develop their skills?" (Evaluates leadership and team development.)

• "How do you ensure quality and precision are maintained when working under tight deadlines?" (Addresses "Bias for Action" vs. "Frugality" or "Deliver Results".) Portfolio Presentation Strategy:

• Focus on Impact: For each project, clearly articulate the business or technical problem you solved and the measurable impact of your work. Use numbers and data wherever possible.

• Tell a Story: Structure your presentation as a narrative. For each complex build or process improvement, describe the challenge, your thought process, the steps you took, and the outcome.

• Visual Aids are Key: Use high-quality images of parts, CAD models, diagrams of fixturing, and flowcharts of processes. This is especially important for a hands-on role.

• Be Ready for Deep Dives: Anticipate detailed technical questions about your portfolio items. Know the specifics of materials, tooling, speeds, feeds, tolerances, and any challenges encountered.

• Connect to Amazon's LPs: Frame your experiences and portfolio items in the context of Amazon's Leadership Principles (e.g., "This project demonstrated my Ownership...", "My approach to this problem aligns with Bias for Action...").

📝 Enhancement Note: Amazon's interview process is known for its structured approach, often involving STAR method (Situation, Task, Action, Result) for behavioral questions and deep technical dives. Candidates should prepare specific, data-backed examples for all aspects of their experience.

📌 Application Steps

To apply for this Senior Prototyping Engineer position:

• Submit your application through the official Amazon Jobs portal.

• Curate your Operations Portfolio: Select 2-3 of your most impactful projects showcasing complex aerospace prototyping, process improvements, or DFM influence. Quantify results and prepare clear visuals.

• Tailor Your Resume: Highlight your expertise in advanced CNC machining, specific CAM/CAD software (HyperMILL, ESPRIT, Siemens NX), GD&T, and experience leading/mentoring teams. Use keywords from the job description.

• Prepare STAR Method Examples: For Amazon's Leadership Principles, prepare specific, detailed examples for Ownership, Bias for Action, Invent and Simplify, Earn Trust, and Dive Deep.

• Research Amazon Leo and OISL: Understand the company's mission for satellite internet and the role of the Prototyping and Integration Team in achieving it. Be ready to discuss your enthusiasm for this specific technology.

• Practice Technical Explanations: Be prepared to verbally walk through your portfolio projects and answer detailed technical questions about machining processes, CAM strategies, and GD&T.

⚠️ 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.