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

• Spearhead end-to-end CNC programming, setup, and production of complex aerospace prototypes for Amazon's low Earth orbit satellite network (Amazon Leo).

• Drive advanced machining strategies, optimizing tool paths, fixturing, and process sequencing for precision electro-mechanical components.

• Act as a technical authority, partnering with design and manufacturing engineering to ensure design-for-manufacturability and scalable prototyping processes.

• Lead continuous improvement initiatives, establishing and owning processes that raise the capability, throughput, and efficiency of the machine shop.

• Mentor other machinists and prototyping engineers, setting the standard for machining quality and repeatability in a fast-paced development environment.

📝 Enhancement Note: This role is deeply embedded within the hardware development lifecycle of Amazon's satellite network, requiring a blend of hands-on machining expertise, strategic process ownership, and collaborative engineering partnership. The "Leo OISL" designation signifies involvement in the Optical Intersatellite Link organization, indicating a focus on high-precision, cutting-edge electro-mechanical components for satellite communication.

📈 Primary Responsibilities

• Own the comprehensive programming, setup, and machining of intricate aerospace prototypes on advanced multi-axis mills, lathes, and mill-turn equipment, ensuring adherence to print specifications and delivery schedules.

• Develop and implement sophisticated machining strategies utilizing CAM software (HyperMILL, ESPRIT, or equivalent), with a focus on optimizing tool paths, fixturing solutions, and overall 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 and translate complex, innovative designs into producible and high-fidelity prototypes.

• Proactively manage and prioritize multiple concurrent prototyping requests, effectively coordinating machine time, tooling selection, and material acquisition to maintain optimal program velocity and accelerate hardware development timelines.

• Champion and lead continuous improvement initiatives throughout the machine shop, establishing robust processes, ensuring their successful implementation, and creating scalable mechanisms designed to increase throughput and significantly reduce cycle times for prototype production.

• Develop, maintain, and refine comprehensive machining documentation, detailed work instructions, and precise process specifications to guarantee consistent, repeatable, and high-quality execution of all machining operations.

• Conduct thorough inspection and validation of machined components using advanced metrology techniques, actively troubleshooting any quality issues and driving corrective actions to their root cause for long-term resolution.

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

📝 Enhancement Note: The responsibilities highlight a need for proactive engagement with design and manufacturing engineering, emphasizing the "design for manufacturability" aspect. This indicates the role is not just about executing given designs but actively shaping them for efficient and reliable production of prototypes. The emphasis on "continuous improvement" and "scalable mechanisms" points towards a strategic approach to process development, aiming to build lasting efficiency rather than just meeting immediate demands.

🎓 Skills & Qualifications

Education:

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

• A proven track record of 2+ years overseeing and driving continuous improvement initiatives, specifically by establishing new processes and demonstrating full ownership through their successful conclusion.

• Demonstrated experience managing multiple concurrent projects and priorities across different teams within a fast-paced, deadline-driven environment. Required Skills:

• Expert knowledge of advanced CAM software such as HyperMILL, ESPRIT, or equivalent systems for programming multi-axis machining operations.

• Proficient understanding and application of Geometric Dimensioning and Tolerancing (GD&T) principles for interpreting complex engineering drawings and ensuring dimensional accuracy.

• Strong capabilities in operating and troubleshooting complex CNC machinery, including multi-axis milling, turning, and mill-turn equipment.

• Experience in the development and implementation of continuous improvement processes within a manufacturing or prototyping environment.

• Ability to frequently move lab equipment and materials weighing up to 40 pounds, and to visually inspect and distinguish fine detail in precision optical/mechanical components. Preferred Skills:

• Expertise with CAD software, such as Siemens NX, for design review and potential CAM integration.

• Comprehensive manufacturing process knowledge, including but not limited to coatings, heat treating, and various finishing processes relevant to aerospace components.

• Prior experience machining aerospace, defense, or other high-reliability precision hardware, demonstrating an understanding of stringent quality requirements.

• Experience mentoring junior machinists or prototyping engineers, and a demonstrated ability to establish and uphold high shop standards.

• Excellent verbal and written communication skills, with a strong aptitude for collaborating effectively across diverse engineering disciplines.

📝 Enhancement Note: The qualifications emphasize both deep technical machining skills and essential engineering collaboration capabilities. The requirement for a Bachelor's degree in a relevant engineering field, combined with 5+ years of hands-on CNC experience, indicates a role that bridges practical execution with engineering principles. The explicit mention of HyperMILL/ESPRIT and GD&T points to specific technical proficiencies expected. The inclusion of "continuous improvement" and "mentoring" suggests a leadership and process-oriented mindset is valued.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• Showcase case studies demonstrating successful end-to-end CNC machining projects, detailing the complexity of the components, materials used, and the precision achieved.

• Present examples of optimized tool paths, fixturing strategies, and process sequencing that led to significant improvements in cycle time, quality, or repeatability for prototypes.

• Include documentation or visual evidence of design-for-manufacturability (DFM) feedback provided to engineering teams and the resulting impact on component design and production.

• Demonstrate experience in developing and implementing new machining processes or workflows, illustrating the problem identified, the solution implemented, and the measurable outcomes. Process Documentation:

• Provide examples of detailed work instructions, setup sheets, or process specifications created for complex CNC operations, highlighting clarity and completeness.

• Illustrate how you have documented and standardized machining processes to ensure consistent quality and enable knowledge transfer to other team members.

• Show evidence of troubleshooting quality issues, including root cause analysis documentation and the implementation of corrective actions to prevent recurrence.

📝 Enhancement Note: For a role like this, a portfolio is critical for demonstrating practical application of skills. It should not just list capabilities but provide concrete examples of problem-solving, process optimization, and successful project execution in complex machining environments, particularly with aerospace-grade precision. The emphasis on process documentation underscores the need for a systematic and repeatable approach to prototyping.

💵 Compensation & Benefits

Salary Range: $122,600 - $170,000 USD annually (based on Northridge, California location)

Benefits:

• Comprehensive Health Insurance: Including medical, dental, vision, and prescription coverage.

• Specialized Support: Employee Assistance Program (EAP), Mental Health Support, and Medical Advice Line.

• Financial Wellness: Flexible Spending Accounts (FSAs) and 401(k) matching program.

• Family Support: Adoption and surrogacy reimbursement coverage, and robust parental leave policies.

• Additional Compensation: Includes sign-on payments and Restricted Stock Units (RSUs) as part of the overall compensation package.

• Paid Time Off: Generous paid time off to support work-life balance.

Working Hours: Approximately 40 hours per week, with potential for overtime due to the fast-paced, deadline-driven nature of prototyping and hardware development.

📝 Enhancement Note: The salary range provided is specific to the Northridge, California location and reflects the senior level and specialized nature of this CNC Prototyping Engineer role within the aerospace and satellite technology sector. The comprehensive benefits package offered by Amazon is standard for large tech organizations, with specific additions like adoption/surrogacy reimbursement and RSUs highlighting Amazon's total rewards approach. The "40 hours per week" is a baseline, but the operational context of rapid prototyping implies flexibility and potential for extended hours when critical deadlines loom.

🎯 Team & Company Context

🏢 Company Culture

Industry: E-commerce, Cloud Computing, Artificial Intelligence, Satellite Communications, Aerospace Technology. Amazon's involvement in the Amazon Leo project places this role at the forefront of telecommunications infrastructure innovation.

Company Size: Over 1 million employees globally, indicating a large, complex, and resource-rich organization with extensive opportunities for collaboration and advancement.

Founded: 1994. Amazon's long history and continuous evolution foster a culture of innovation, customer obsession, and a drive for pioneering new markets and technologies.

Team Structure:

• The Prototyping and Integration (PI) Team is a specialized unit within the Optical Intersatellite Link (OISL) organization.

• This team likely operates with a high degree of autonomy and cross-functional collaboration, serving as a critical support function for hardware development across multiple engineering disciplines.

• Reporting structure is within the OISL organization, with direct reporting to a team lead or manager focused on prototyping and manufacturing operations. Methodology:

• Data-driven decision-making is paramount, with a strong emphasis on measurable results and continuous improvement.

• Agile and iterative development methodologies are likely employed to accelerate hardware development cycles and respond quickly to evolving project requirements.

• A culture of ownership and accountability is fostered, where engineers are empowered to manage their work from concept to delivery.

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

📝 Enhancement Note: Amazon's culture is characterized by a high degree of customer obsession, innovation, and a "Day 1" mentality, emphasizing agility and forward-thinking. For the PI team, this translates into a demanding yet rewarding environment focused on rapidly bringing cutting-edge hardware to life for the Amazon Leo project. The scale of Amazon means access to significant resources and expertise, but also requires navigating complex internal processes.

📈 Career & Growth Analysis

Operations Career Level: This is a Senior Engineer/Specialist role, requiring significant hands-on expertise and the ability to operate with a high degree of autonomy. It sits at the intersection of skilled trades (machining) and engineering principles, demanding both technical mastery and process-oriented thinking.

Reporting Structure: The role reports within the Prototyping and Integration (PI) Team, likely to a PI Team Lead or Manager. Collaboration will be extensive with Design Engineers, Manufacturing Engineers, and potentially Project Managers across the Amazon Leo program.

Operations Impact: The CNC Prototyping Engineer's work directly impacts the speed and quality of hardware development for the Amazon Leo satellite network. By producing high-fidelity prototypes rapidly and reliably, this role enables faster testing, iteration, and ultimately, the quicker deployment of Amazon's satellite broadband services. Their ability to improve processes directly contributes to scaling manufacturing capabilities and reducing development risks.

Growth Opportunities:

• Technical Specialization: Deepen expertise in advanced multi-axis machining, specific CAM software, or specialized finishing processes relevant to aerospace.

• Process Leadership: Transition into roles focused on scaling manufacturing processes, implementing automation, or leading continuous improvement efforts across larger teams.

• Cross-Functional Mobility: Move into roles within Design Engineering, Manufacturing Engineering, or Program Management within the Amazon Leo or broader aerospace divisions.

• Mentorship & Team Lead: Grow into a leadership position, mentoring junior engineers and managing the day-to-day operations of the prototyping lab.

📝 Enhancement Note: This role offers a clear path for growth from a highly skilled individual contributor to a process leader or cross-functional engineer within a groundbreaking aerospace project. The emphasis on "mentoring" and "setting standards" suggests a latent leadership track is available for those who excel.

🌐 Work Environment

Office Type: This is a hands-on, laboratory-based role. The primary workspace will be within a dedicated machine shop environment equipped with advanced CNC machinery and associated tooling.

Office Location(s): Northridge, California. This location likely houses significant engineering and prototyping facilities for Amazon's aerospace initiatives.

Workspace Context:

• A dynamic and collaborative machine shop environment where interaction with fellow machinists, prototyping engineers, and design/manufacturing engineers is frequent and essential.

• Access to state-of-the-art CNC equipment, CAM software, metrology tools, and potentially CAD stations for design review.

• The workspace requires adherence to strict safety protocols inherent in a machining environment.

• Opportunities to observe and participate in engineering discussions related to hardware design and testing.

Work Schedule: While the standard is approximately 40 hours per week, the nature of rapid prototyping for a satellite network implies a need for flexibility. Urgent requests and critical testing schedules may necessitate working extended hours or adjusting schedules to meet project deadlines.

📝 Enhancement Note: The work environment is unequivocally hands-on and shop-floor oriented. Candidates must be comfortable in an industrial setting, working with machinery, and interacting directly with engineering teams on the development floor. The "fast-paced, deadline-driven" aspect means the schedule can be demanding, requiring adaptability.

📄 Application & Portfolio Review Process

Interview Process:

• Initial Screening: A review of your resume and application to assess alignment with basic and preferred qualifications, with a focus on CNC machining experience, CAM proficiency, and engineering background.

• Technical Interview(s): Expect in-depth discussions on CNC programming techniques, CAM software usage (HyperMILL/ESPRIT), GD&T interpretation, fixture design, and problem-solving approaches for complex machining challenges. You may be asked to walk through specific examples from your experience.

• Portfolio Review: A dedicated session where you will present examples of your work, showcasing your machining projects, process improvements, and DFM contributions. Be prepared to discuss your role, the challenges faced, and the outcomes achieved.

• Behavioral/Situational Interviews: Questions designed to assess your ability to work autonomously, collaborate with engineering teams, manage priorities, lead continuous improvement, and mentor others. Expect scenarios related to fast-paced environments and urgent requests.

• On-site Visit/Shop Tour: If feasible, an opportunity to see the facilities and potentially meet some of the team members you would be working with.

Portfolio Review Tips:

• Quantify Achievements: For each project, clearly state the problem, your solution, and the quantifiable results (e.g., "Reduced cycle time by 15%," "Improved part tolerance by X microns," "Enabled first-time-right prototype delivery for critical component").

• Showcase DFM Impact: Highlight instances where your input improved a design for manufacturability, and the positive downstream effects.

• Process Improvement Focus: Dedicate a section to continuous improvement initiatives, detailing the process you optimized, the methods used, and the measurable impact.

• Technical Depth: Be prepared to discuss the specifics of the machining processes, tooling, materials, and software used in your portfolio examples.

• Storytelling: Frame your experience as compelling narratives that demonstrate problem-solving, technical skill, and impact.

Challenge Preparation:

• Machining Scenario: You might be presented with a complex 3D model or print and asked to outline your approach to programming, fixturing, and machining it, considering potential challenges.

• Process Improvement Exercise: Be ready to discuss how you would approach improving a specific aspect of the current machine shop operations or address a common prototyping bottleneck.

• DFM Discussion: Prepare to analyze a hypothetical or real part design and suggest modifications for improved manufacturability.

📝 Enhancement Note: The interview process is designed to rigorously assess both hands-on technical proficiency and strategic process thinking. A strong portfolio that clearly articulates impact and demonstrates a proactive, problem-solving approach will be crucial for success. Candidates should prepare to discuss their technical decisions and their impact on project timelines and quality.

🛠 Tools & Technology Stack

Primary Tools:

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

• CAM Software: Expert knowledge required in HyperMILL, ESPRIT, or equivalent advanced CAM systems for programming complex tool paths.

• CAD Software: Familiarity with Siemens NX is preferred; experience with other CAD systems for design review is valuable.

• Metrology & Inspection Tools: Calipers, micrometers, CMM (Coordinate Measuring Machine) operation, optical comparators, and other precision measurement devices for quality validation.

Analytics & Reporting:

• While not a primary data analyst role, understanding of manufacturing KPIs (Key Performance Indicators) such as cycle time, throughput, first-pass yield, and machine uptime will be essential for reporting on process improvements. CRM & Automation:

• This role is less about CRM and more about production process automation within the machine shop. Experience with machine tool automation features, potentially integrated workflows between CAD/CAM/machine controllers, and process optimization for efficiency are key.

📝 Enhancement Note: The technology stack is heavily focused on advanced manufacturing equipment and software. Proficiency in specific CAM packages (HyperMILL, ESPRIT) and an understanding of CAD integration are critical. The emphasis is on tools that enable high-precision, complex part manufacturing.

👥 Team Culture & Values

Operations Values:

• Customer Obsession: While not directly customer-facing, the ultimate goal is to support the Amazon Leo mission, serving end-users by enabling rapid hardware development. This means prioritizing the needs of internal engineering and test teams.

• Bias for Action: A willingness to act quickly and decisively, especially in a prototyping environment where speed is often critical, balanced with a commitment to quality.

• Invent and Simplify: Continuously seeking innovative machining techniques and simplifying complex processes to achieve faster, more reliable prototype production.

• High Standards: Maintaining the highest possible standards for machining precision, quality, and process documentation, reflecting the critical nature of aerospace components.

• Ownership: Taking full responsibility for machining tasks from programming to final inspection, and for the success of continuous improvement initiatives.

Collaboration Style:

• Cross-functional Integration: Working closely with design, manufacturing, and test engineers to ensure prototypes meet all requirements and to provide feedback for future designs.

• Knowledge Sharing: Actively sharing expertise with other machinists and engineers, contributing to a team environment where learning and development are prioritized.

• Constructive Feedback: Providing and receiving feedback constructively to drive process improvements and enhance product quality.

📝 Enhancement Note: The team culture likely mirrors Amazon's broader values but with a specific focus on the demands of rapid, high-stakes hardware development. Expect a fast-paced, results-oriented environment where technical expertise, proactive problem-solving, and strong teamwork are highly valued.

⚡ Challenges & Growth Opportunities

Challenges:

• Rapid Iteration Demands: Balancing the need for speed in prototyping with the requirement for extremely high precision and quality demanded by aerospace applications.

• Complex Geometries: Machining intricate and novel designs that push the boundaries of conventional machining techniques.

• Material Science: Working with advanced or specialized materials that require unique machining strategies and tooling.

• Keeping Pace with Innovation: Continuously learning and adapting to new machining technologies, software updates, and the evolving requirements of the Amazon Leo program.

Learning & Development Opportunities:

• Advanced Machining Techniques: Opportunities to train on and master new CNC functionalities, multi-axis machining strategies, and specialized processes.

• Industry Best Practices: Exposure to cutting-edge manufacturing techniques and quality standards within the aerospace and satellite communications sectors.

• Process Optimization Skills: Developing expertise in lean manufacturing principles, Six Sigma methodologies, and data analysis for continuous improvement.

• Mentorship and Leadership Development: Formal and informal opportunities to mentor junior team members and potentially grow into leadership roles managing prototyping operations.

📝 Enhancement Note: The challenges presented are inherent to working on a cutting-edge aerospace project. The growth opportunities are tied to mastering these challenges and leveraging the experience to advance within specialized technical or leadership tracks.

💡 Interview Preparation

Strategy Questions:

• "Describe a time you had to machine a highly complex part with tight tolerances. What was your approach, what challenges did you face, and how did you ensure quality?" (Focus on process, problem-solving, GD&T application)

• "How would you approach providing Design for Manufacturability (DFM) feedback on a new component design for our satellite network? What criteria would you use?" (Focus on collaboration, engineering understanding, practical advice)

• "Walk me through a continuous improvement initiative you led in a machine shop. What was the problem, what steps did you take, and what were the measurable results?" (Focus on ownership, process thinking, data-driven outcomes) Company & Culture Questions:

• "Why are you interested in working on the Amazon Leo satellite network specifically?" (Show passion for the mission and technology)

• "How do you handle working in a fast-paced environment with shifting priorities and urgent requests?" (Demonstrate adaptability and prioritization skills)

• "Describe a situation where you had to mentor a junior machinist or engineer. What was your approach?" (Highlight leadership and knowledge-sharing capabilities) Portfolio Presentation Strategy:

• Structure: Organize your portfolio by project type or by skill demonstrated (e.g., Complex Multi-Axis Machining, Process Improvement, DFM Contribution).

• Narrative: For each example, clearly articulate the objective, the technical approach (software, tooling, processes), the challenges, your specific contributions, and the quantifiable outcome.

• Visuals: Use high-quality images, CAD models, or short videos of the parts you've machined to showcase your work effectively.

• Conciseness: Be prepared to present your key projects within a set timeframe, focusing on the most impactful examples.

• Q&A Readiness: Anticipate detailed technical questions about your methods and be ready to discuss alternative approaches.

📝 Enhancement Note: Interview preparation should focus on demonstrating a strong blend of technical machining expertise, strategic process improvement capabilities, and collaborative engineering skills. Candidates should be ready to speak confidently about their past projects, their problem-solving methodologies, and their understanding of aerospace-grade precision manufacturing.

📌 Application Steps

To apply for this CNC Prototyping Engineer position:

• Submit your application through the Amazon Jobs portal.

• Resume Optimization: Tailor your resume to highlight specific experience with multi-axis CNC machining, CAM software (HyperMILL, ESPRIT), GD&T, aerospace prototyping, and continuous improvement initiatives. Use keywords from the job description.

• Portfolio Curation: Prepare a digital portfolio that showcases your best work, including examples of complex parts machined, process improvements with quantifiable results, and instances where you provided DFM feedback.

• Technical Preparation: Review your knowledge of CNC programming principles, CAM strategies, GD&T, and common aerospace manufacturing processes. Be ready to discuss specific tooling, materials, and machining techniques.

• Company Research: Familiarize yourself with Amazon's mission for Amazon Leo and the Optical Intersatellite Link (OISL) organization to articulate your interest and alignment with the company's innovative goals.

⚠️ 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.