CNC Prototyping Engineer, Amazon Leo OISL

📍 Job Overview

Job Title: CNC Prototyping Engineer, Amazon Leo OISL

Company: Amazon

Location: Northridge, California, United States

Job Type: Full-Time

Category: Engineering / Manufacturing Operations

Date Posted: 2026-08-28

Experience Level: 5-10 Years

Remote Status: On-site

🚀 Role Summary

• This role is critical for accelerating hardware development within Amazon's low Earth orbit satellite network (Amazon Leo), focusing on rapid prototyping of electro-mechanical components.

• The position demands hands-on expertise in CNC programming, setup, and production of complex aerospace prototypes, ensuring precision and adherence to stringent quality standards.

• The CNC Prototyping Engineer will act as a technical authority, driving design-for-manufacturability (DFM) feedback and developing scalable prototyping processes to enhance hardware development velocity.

• This role involves significant process ownership, continuous improvement initiatives, and mentorship, aiming to elevate the overall capability and efficiency of the prototyping lab.

📝 Enhancement Note: The job title and description indicate a highly specialized role within a cutting-edge aerospace program (Amazon Leo). This is not a typical manufacturing role but rather one focused on rapid iteration and development of novel components for satellite technology. The emphasis on "prototyping" suggests a need for adaptability, quick problem-solving, and the ability to work with experimental designs.

📈 Primary Responsibilities

• Own the end-to-end machining lifecycle for complex aerospace prototypes, from CAM programming and machine setup to final production of precision electro-mechanical components.

• Develop and implement advanced CNC machining strategies using CAM software (HyperMILL, ESPRIT, or equivalent) to optimize tool paths, fixturing, and process sequencing for enhanced quality, speed, and repeatability.

• Collaborate closely with Mechanical, Manufacturing, and Design engineering teams to provide critical design-for-manufacturability (DFM) feedback, translating intricate designs into producible prototypes.

• Manage and prioritize multiple concurrent prototyping requests, effectively coordinating machine time, tooling, and material procurement to maintain program velocity and meet aggressive deadlines.

• Lead and execute continuous improvement initiatives within the machine shop, establishing robust processes, ensuring their successful implementation, and creating scalable mechanisms to increase throughput and reduce cycle times.

• Develop and maintain comprehensive machining documentation, including detailed work instructions and process specifications, to ensure consistent, repeatable execution of prototype fabrication.

• Perform rigorous inspection and validation of machined components using GD&T principles, troubleshooting quality issues, and driving corrective actions to root cause to prevent recurrence.

• Respond dynamically to interruptions and urgent requests from test and engineering teams, balancing the need for rapid turnaround with the imperative of sustained build quality and precision.

📝 Enhancement Note: The responsibilities highlight a blend of deep technical machining skills and engineering collaboration. The emphasis on "owning the end-to-end machining lifecycle" and "driving continuous improvement" suggests a role with significant autonomy and impact on process development, not just execution.

🎓 Skills & Qualifications

Education:

• Bachelor's degree in Mechanical Engineering, Aerospace Engineering, Manufacturing Engineering, or an equivalent engineering field. Experience:

• Minimum of 5 years of hands-on machine shop experience operating complex CNC equipment, including multi-axis mills, mill-turn centers, or equivalent advanced machining systems.

• Minimum of 2 years of proven experience overseeing and leading continuous improvement initiatives, specifically by establishing new processes and demonstrating full ownership through to successful conclusion. Required Skills:

• Expert-level proficiency in CNC programming, setup, and operation of multi-axis mills, lathes, and mill-turn equipment.

• Deep expertise in advanced CAM software, specifically HyperMILL, ESPRIT, or equivalent, for developing and optimizing complex tool paths.

• Strong understanding and application of Geometric Dimensioning and Tolerancing (GD&T) for precision component verification.

• Ability to frequently move lab equipment and materials weighing up to 40 pounds, demonstrating the physical capacity required for a hands-on role.

• Keen ability for visual inspection and distinguishing fine details in precision optical and mechanical components, crucial for quality assurance.

• Demonstrated experience in driving continuous improvement initiatives and owning process development to completion. Preferred Skills:

• Excellent manufacturing process knowledge, including expertise in coatings, heat treating, and other finishing processes relevant to aerospace components.

• Experience utilizing Siemens NX or other advanced CAD systems for design review and fixture development.

• Prior experience machining aerospace, defense, or other high-reliability precision hardware components.

• Proven experience mentoring junior machinists or prototyping engineers and establishing shop floor standards.

• Strong verbal and written communication skills, enabling effective collaboration across diverse engineering disciplines.

📝 Enhancement Note: The "Basic Qualifications" clearly outline a senior-level role requiring substantial hands-on experience and specific software expertise. The "Preferred Qualifications" point towards a candidate who can not only perform the technical tasks but also contribute to team development and broader manufacturing process knowledge. The export control requirement is a critical qualification that must be met by all candidates.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• Demonstrations of complex multi-axis CNC programs developed for intricate aerospace geometries, showcasing advanced toolpath strategies and optimization techniques.

• Case studies detailing the successful implementation of new machining processes or continuous improvement initiatives, highlighting measurable gains in throughput, cycle time, or quality.

• Examples of design-for-manufacturability (DFM) feedback provided to engineering teams, illustrating how design modifications improved producible prototypes.

• Documentation or examples of quality inspection reports for precision components, emphasizing adherence to tight tolerances and GD&T specifications.

• Evidence of managing multiple concurrent prototyping projects, showcasing organizational skills and ability to meet demanding timelines. Process Documentation:

• Examples of detailed work instructions or standard operating procedures (SOPs) developed for CNC machining operations, demonstrating clarity and focus on repeatability.

• Documentation outlining the development and implementation of new manufacturing processes or the refinement of existing ones, including data supporting their effectiveness.

• Records of troubleshooting and root cause analysis for machining defects or quality issues, showcasing a systematic approach to problem resolution.

• Process maps or flowcharts illustrating workflow optimization efforts within a machine shop or prototyping environment.

📝 Enhancement Note: For a role focused on prototyping and process improvement, a portfolio is essential. It should not just list skills but provide tangible evidence of past work, process development, and problem-solving capabilities, particularly in the context of aerospace or high-precision manufacturing.

💵 Compensation & Benefits

Salary Range:

• The base salary range for this position in Northridge, California, is $122,600 to $170,000 USD annually.

• 📝 Enhancement Note: This salary range is provided by Amazon and reflects the senior level of this specialized engineering role in the specified high-cost-of-living area. The estimate is based on the provided data and aligns with industry benchmarks for experienced CNC Prototyping Engineers in aerospace or advanced manufacturing sectors within the US.

Benefits:

• Comprehensive health insurance package: medical, dental, and vision insurance.

• Prescription insurance and access to a Medical Advice Line.

• Basic Life & AD&D insurance with options for Supplemental life plans.

• Employee Assistance Program (EAP) and Mental Health Support services.

• Flexible Spending Accounts (FSAs) for healthcare and dependent care.

• Adoption and Surrogacy Reimbursement coverage.

• 401(k) retirement plan with company matching.

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

• Additional compensation components include sign-on payments and Restricted Stock Units (RSUs). Working Hours:

• Standard working hours are typically 40 hours per week, with the expectation of flexibility to meet project demands and urgent requests typical in a fast-paced prototyping environment.

📝 Enhancement Note: The benefits package is extensive, reflecting Amazon's commitment to employee well-being and financial security. The inclusion of sign-on payments and RSUs indicates a competitive total compensation strategy beyond the base salary.

🎯 Team & Company Context

🏢 Company Culture

Industry: Technology (Satellite Communications, Aerospace, E-commerce Infrastructure)

Company Size: Amazon is a global technology giant with hundreds of thousands of employees worldwide. The Leo OISL organization, while part of this larger entity, operates with the agility and focus of a dedicated project team.

Founded: Amazon was founded in 1994, with the Leo OISL (Optical Intersatellite Link) organization being a more recent, highly innovative venture within the company.

Team Structure:

• The Prototyping and Integration (PI) Team is part of the Optical Intersatellite Link (OISL) organization, which itself is a critical component of Amazon Leo.

• This team likely comprises specialized engineers and technicians in areas such as Hardware Fabrication, Electrical Integration, Electromechanical Hardware Development, and Quality Assurance.

• The CNC Prototyping Engineer will report into a management structure within the PI Team, likely a Prototyping Manager or Engineering Lead, and will collaborate closely with design engineers, manufacturing engineers, and test engineers across OISL. Methodology:

• Data-Driven Decisions: Amazon's culture strongly emphasizes data analysis and metrics to drive decisions and measure performance. This applies to prototyping processes as well, focusing on cycle time, yield, and component conformance.

• Agile Development: The fast-paced nature of satellite development and prototyping necessitates an agile approach, allowing for rapid iteration, quick feedback loops, and adaptability to changing requirements.

• Customer Obsession: While this role is internal-facing, the ultimate goal of Amazon Leo is to serve customers. This focus translates to a drive for high-quality, reliable hardware that meets performance specifications.

• Bias for Action: Amazon encourages employees to take initiative and act decisively, especially in development environments where speed is critical.

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

📝 Enhancement Note: Understanding Amazon's core principles like "Customer Obsession," "Bias for Action," and "Invent and Simplify" is crucial for fitting into the company culture. The OISL team specifically operates with a high degree of innovation and a focus on accelerating hardware development.

📈 Career & Growth Analysis

Operations Career Level: This role is positioned as a Senior Engineer or Technical Specialist within the prototyping and manufacturing operations domain. It requires deep technical expertise and the ability to function autonomously, mentor others, and drive process improvements.

Reporting Structure: The CNC Prototyping Engineer will report to a manager or lead within the Prototyping and Integration Team. They will collaborate extensively with cross-functional engineering teams (Design, Manufacturing, Test) but will likely maintain a primary reporting line within the fabrication/production side of the organization.

Operations Impact: This role has a direct and significant impact on the speed and success of Amazon Leo's hardware development. By producing high-quality prototypes rapidly and efficiently, the engineer directly contributes to:

• Accelerating the testing and validation cycles for new satellite components and systems.

• Reducing development risks by identifying manufacturability issues early.

• Enabling faster iteration on designs, leading to improved product performance and reliability.

• Contributing to the scalability of manufacturing processes for future satellite production. Growth Opportunities:

• Technical Specialization: Deepen expertise in advanced multi-axis machining, specific CAM software, or emerging manufacturing technologies within the aerospace sector.

• Process Engineering Leadership: Transition into roles focused on developing and scaling manufacturing processes for larger production runs, or leading continuous improvement initiatives across multiple teams.

• Team Leadership: Progress into a team lead or management position, overseeing a team of machinists and prototyping engineers, setting technical direction, and managing project execution.

• Cross-Functional Mobility: Leverage experience to move into roles in manufacturing engineering, hardware design liaison, or test engineering within Amazon Leo or other advanced technology divisions at Amazon.

• Industry Expertise: Become a recognized expert in aerospace prototyping and advanced manufacturing techniques within a leading technology company.

📝 Enhancement Note: Amazon's structure often allows for significant career growth, both vertically and horizontally. For an operations role like this, growth can involve becoming a deeply specialized technical expert, moving into leadership and process management, or pivoting into related engineering disciplines.

🌐 Work Environment

Office Type: This is an on-site role, primarily based in a machine shop/lab environment. While there will be office-based work for programming, documentation, and collaboration, the core of the job is hands-on at the CNC machinery.

Office Location(s): Northridge, California, within the Los Angeles County area, a region known for its aerospace and technology industries.

Workspace Context:

• Hands-On Environment: The primary workspace will be within a state-of-the-art machine shop equipped with advanced multi-axis CNC equipment, CAD/CAM workstations, and inspection tools.

• Collaborative Atmosphere: The Prototyping and Integration Team fosters a collaborative environment where engineers and technicians work closely together, sharing knowledge and problem-solving collectively. Proximity to design and test teams is likely.

• Technology Integration: Access to the latest CAM software, CAD tools, and potentially advanced metrology equipment will be standard, supporting cutting-edge prototyping efforts.

• Dynamic Pace: The environment is fast-paced, with shifting priorities and urgent requests, requiring adaptability and efficient workflow management.

Work Schedule: The standard work week is 40 hours, but the nature of prototyping and urgent project demands may require flexibility, including occasional overtime or adjusted schedules to meet critical deadlines.

📝 Enhancement Note: The work environment is crucial to highlight for candidates. It's a hands-on, technically advanced, and fast-paced setting that requires a specific type of engineer who thrives on direct involvement with machinery and rapid problem-solving.

📄 Application & Portfolio Review Process

Interview Process:

• Initial Screening: A recruiter will likely conduct an initial phone screen to assess basic qualifications, interest, and cultural fit.

• Technical Interview(s): Expect multiple rounds of technical interviews, potentially including:

  • Hands-on Assessment/Simulation: A practical exercise or discussion focused on programming a specific part, troubleshooting a machine setup, or explaining GD&T application.
  • Problem-Solving Scenarios: Case studies involving complex machining challenges, design interpretation, or process optimization problems.
  • Deep Dive into Experience: Detailed questioning about past projects, specific machining techniques, CAM software usage, and continuous improvement initiatives.
  • Collaboration & Mentorship: Scenarios assessing how you would work with design engineers, mentor junior staff, or handle conflicting priorities.

• Hiring Manager Interview: A discussion with the hiring manager to gauge overall fit, leadership potential, and alignment with team goals.

• Final Round/Executive Interview: Depending on the level, there might be a final interview with senior leadership.

Portfolio Review Tips:

• Curate Selectively: Choose 3-5 of your strongest projects that best showcase your skills in multi-axis CNC programming, complex part machining, process improvement, and DFM feedback.

• Quantify Impact: For each project, clearly articulate the challenge, your specific role and actions, the tools and techniques used, and the quantifiable results (e.g., cycle time reduction by X%, tolerance improvement by Y microns, successful delivery of Z prototypes by deadline).

• Highlight Process Ownership: Emphasize projects where you developed or significantly improved a machining process, demonstrating your ability to drive continuous improvement and establish scalable solutions.

• Showcase DFM: Include examples where your feedback influenced a design for better manufacturability, highlighting your collaborative engineering approach.

• Prepare for Walkthrough: Be ready to walk through your portfolio items, explaining your thought process, technical decisions, and the outcomes in detail. Use clear visuals (drawings, photos of parts, toolpaths) where possible.

Challenge Preparation:

• CAM Software Proficiency: Be prepared to discuss your experience with HyperMILL, ESPRIT, or equivalent CAM systems in detail. If possible, practice or review common operations for multi-axis machining.

• GD&T Mastery: Refresh your knowledge of GD&T symbols, principles, and how they apply to inspecting and manufacturing precision parts.

• Process Improvement Frameworks: Understand methodologies for identifying bottlenecks, implementing solutions, and measuring the impact of process changes.

• Aerospace Manufacturing Context: Familiarize yourself with common challenges and requirements in aerospace prototyping, such as material properties, stringent tolerances, and certification considerations.

📝 Enhancement Note: The interview process for this role will be technically rigorous. A well-prepared portfolio is non-negotiable and should serve as the foundation for demonstrating practical expertise and impact.

🛠 Tools & Technology Stack

Primary Tools:

• CNC Machines: Multi-axis mills, lathes, mill-turn equipment.

• CAM Software: Expert knowledge required in HyperMILL, ESPRIT, or equivalent advanced CAM systems. Proficiency in tool path generation, optimization, simulation, and post-processing.

• CAD Software: Experience with Siemens NX preferred; familiarity with other CAD systems (e.g., SolidWorks, CATIA) is beneficial for design review and fixture design.

• Inspection Equipment: Precision measurement tools, CMM (Coordinate Measuring Machines), optical comparators, micrometers, calipers, bore gauges, etc.

Analytics & Reporting:

• Process Metrics: Tools or methods for tracking machine utilization, cycle times, throughput, scrap rates, and quality conformance.

• Data Analysis: Proficiency in analyzing manufacturing data to identify trends, root causes, and opportunities for improvement. Spreadsheet software (Excel) and potentially more advanced analytical tools may be used.

CRM & Automation:

• While not a direct CRM role, understanding how prototypes feed into larger product development cycles is important.

• Project Management Tools: Likely used for managing multiple concurrent builds and tracking progress (e.g., Jira, Asana, internal Amazon tools).

• Documentation Platforms: Systems for managing work instructions, process specifications, and quality records.

📝 Enhancement Note: The emphasis on specific CAM software (HyperMILL, ESPRIT) is a key indicator of the technical depth required. Candidates should be prepared to discuss their experience with these tools in detail.

👥 Team Culture & Values

Operations Values:

• Invent and Simplify: A core Amazon principle that applies to developing innovative prototyping methods and simplifying complex machining challenges.

• Bias for Action: The team operates with a sense of urgency, prioritizing rapid prototyping to accelerate learning and development cycles.

• High Standards: A commitment to delivering exceptionally high-quality, precise components that meet stringent aerospace specifications.

• Ownership: Taking full responsibility for the entire machining process, from programming to final inspection, and driving improvements.

• Frugality (Applied): While working with advanced technology, there's an underlying Amazon value to be efficient with resources, which translates to optimizing machine time, tooling, and materials.

Collaboration Style:

• Cross-Functional Integration: The team works closely with design, manufacturing, and test engineers, requiring strong communication and the ability to translate between different engineering disciplines.

• Mentorship and Knowledge Sharing: Senior members are expected to mentor junior engineers and machinists, fostering a culture of continuous learning and skill development.

• Feedback-Oriented: Openness to giving and receiving constructive feedback to refine designs, processes, and machining techniques.

• Problem-Solving Focused: A collective approach to tackling complex technical challenges, leveraging the diverse expertise within the team.

📝 Enhancement Note: Understanding Amazon's Leadership Principles is vital. For this role, "Invent and Simplify," "Bias for Action," "Earn Trust," and "Deliver'', are particularly relevant. The team values individuals who are technically adept, collaborative, and driven to achieve ambitious goals.

⚡ Challenges & Growth Opportunities

Challenges:

• Rapid Iteration & Tight Deadlines: Balancing the need for speed in prototyping with the absolute requirement for precision and quality in aerospace components.

• Complex Geometries & Materials: Working with intricate designs and potentially novel materials that push the boundaries of conventional machining capabilities.

• Export Control Compliance: Adhering strictly to U.S. export control laws, which can add complexity to team composition and project execution.

• Process Scalability: Developing prototyping processes that not only work for individual parts but can also be scaled for potential future production needs.

• Balancing Autonomy and Collaboration: Operating independently on machine setups and programming while effectively collaborating with design and manufacturing engineers.

Learning & Development Opportunities:

• Advanced Machining Techniques: Gaining exposure to and mastering cutting-edge multi-axis machining strategies and automation within aerospace prototyping.

• New Material Processing: Learning to machine and optimize processes for a wide range of advanced materials used in satellite technology.

• Industry Best Practices: Deepening knowledge of aerospace manufacturing standards, GD&T application, and quality assurance protocols.

• Mentorship & Leadership Development: Opportunities to mentor junior team members and potentially take on leadership responsibilities for specific projects or process areas.

• Exposure to Cutting-Edge Technology: Working on a groundbreaking project like Amazon Leo provides unparalleled experience in the future of connectivity and satellite technology.

📝 Enhancement Note: This role offers significant growth potential for engineers who thrive on tackling complex technical challenges in a high-stakes, innovative environment. The challenges are directly tied to the cutting-edge nature of the Amazon Leo project.

💡 Interview Preparation

Strategy Questions:

• Process Improvement Scenarios: "Describe a time you identified an inefficiency in a machining process. What steps did you take to improve it, and what was the outcome?" (Focus on your methodology, data used, and impact.)

• DFM Collaboration: "Imagine a design engineer proposes a feature that is extremely difficult to machine. How would you approach discussing this with them and finding a solution that balances design intent with manufacturability?" (Highlight your communication skills, problem-solving approach, and understanding of trade-offs.)

• Prioritization & Urgency: "You have three critical prototype requests with overlapping deadlines. How would you prioritize your work, manage machine time, and communicate your plan to the engineering teams?" (Demonstrate your organizational skills, ability to manage multiple projects, and proactive communication.)

Company & Culture Questions:

• Amazon Leadership Principles: Be prepared to discuss how your experience aligns with principles like "Invent and Simplify," "Bias for Action," "Deliver''," and "Earn Trust." Have specific examples ready.

• Team Dynamics: "How do you contribute to a collaborative team environment, especially when working closely with engineers from different disciplines?" (Emphasize your communication, teamwork, and cross-functional collaboration skills.)

• Quality Focus: "Describe your approach to ensuring the highest quality in precision machined parts, especially when working under tight deadlines." (Showcase your commitment to standards, attention to detail, and rigorous inspection methods.)

Portfolio Presentation Strategy:

• Storytelling: Frame each portfolio piece as a story: the challenge, your solution (your programming/machining strategy), and the positive outcome (part quality, speed, cost savings).

• Technical Depth: Be ready to explain the intricacies of your CAM strategies, tool selection, fixturing methods, and why you made specific technical decisions.

• Quantify Everything: Use numbers and data whenever possible to illustrate the impact of your work (e.g., "reduced cycle time by 15%", "achieved tolerances within 0.0005 inches").

• Visual Aids: Use clear images of parts, toolpaths, and machine setups to enhance your explanations.

• Focus on Process Ownership: Explicitly highlight instances where you owned a process from start to finish or drove significant improvements.

📝 Enhancement Note: The interview will heavily test your practical, hands-on expertise and your ability to apply engineering principles to real-world prototyping challenges. Your portfolio is your primary tool to demonstrate this practical application.

📌 Application Steps

To apply for this operations position:

• Submit your application through the Amazon Jobs portal for the CNC Prototyping Engineer role.

• Curate Your Resume: Tailor your resume to highlight specific CNC machining experience, CAM software proficiency (HyperMILL, ESPRIT), GD&T knowledge, aerospace or precision manufacturing experience, and any demonstrated leadership or continuous improvement initiatives. Use keywords from the job description.

• Prepare Your Portfolio: Select 3-5 of your most impactful projects that showcase your ability to program, set up, and produce complex prototypes. Ensure each project clearly articulates the challenge, your solution, and quantifiable results.

• Practice Interview Responses: Prepare to answer technical questions, behavioral questions using the STAR method (Situation, Task, Action, Result) aligned with Amazon's Leadership Principles, and questions related to your portfolio.

• Research Amazon Leo: Familiarize yourself with Amazon's satellite internet initiatives and the broader goals of the OISL organization to demonstrate your understanding of the company's strategic direction and the importance of this role.

⚠️ 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.