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Principal GNC Engineer

Spacecraft represent the most pressing unmet need across the entire aerospace industry. As more launch vehicles come online and the cost to orbit decreases, more companies launching payloads to space continue to emerge.


For the first time in history, this influx of payload companies combined with reduced launch costs has resulted in a massive increase in need for commercial spacecraft platforms, known as satellite buses. These buses hold the payloads of our customers and are flown on launch vehicles.


Apex manufactures these satellite buses at scale using a combination of software, vertical integration, and hardware that is designed for manufacturing. Our spacecraft enable the future of society: ranging from earth observation to communications and more.


We’d love for you to join us on our mission of providing humankind access to the galaxy beyond our planet. 


Based out of Apex’s global headquarters in Playa Vista, the Principal Guidance Navigation and Control (GNC) is responsible for leading GNC development for Apex’s growing fleet of spacecraft platforms. You will demonstrate a firm grasp of spacecraft GNC concepts and applications. You will work with all facets of the engineering life cycle: spacecraft concept and algorithm development, flight software implementation, subsystem requirements development, detailed GNC design, subsystem integration & test (I&T), and vehicle I&T. You will be responsible for planning and maintaining the development schedule to support the Space Systems Control Software organization in executing leading edge programs and products. You will work closely with related teams, including Systems, Avionics, Flight Software, Mission Operations, and Ground Software. You will also directly interact with customers to ensure mission success.


Responsibilities:
  • Lead architect responsible for GNC design, modeling, and analysis for a wide variety of spacecraft and space missions to include LEO, MEO, GEO, and RPOD 
  • Design of flight software, algorithms, and simulation product 
  • Development of spacecraft autonomy tools for constellation management 
  • GNC component selection and GNC subsystem design 
  • Test process development and execution 
  • Define fault detection and response 
  • Hardware-in-the-loop and Monte Carlo simulation 
  • Integration of flight and simulation software with modern analysis, test, and operations tools 
  • Support internal and external design reviews 
  • Work with department leads and program managers to plan and maintain team schedule and milestones and report technical status


Requirements:
  • BS and 12+ years of industry experience in GNC/ADCS, advanced degrees preferred 
  • 5+ years of industry experience developing/operating spacecraft/satellites 
  • Prior experience leading a team of three or more direct reports 
  • Prior experience directly interfacing with aerospace customers in the commercial or government sectors 
  • Experience in Jira planning and workflow 
  • Hands-on experience with IMU, reaction wheels, star trackers, gyroscopes, and other GNC hardware 
  • Experience developing blended attitude solutions from a variety of sensor data 
  • Demonstrated experience developing, implementing, and verifying flight software 
  • Demonstrated experience with spacecraft on-orbit operations and anomaly resolution 
  • Prior experience leading a team across a project lifecycle 
  • Prior experience working multiple projects simultaneously and determining priorities for a team 
  • Experience with GNC-related Business Development or conceptual design work


Benefits


Apex believes in creating a work environment that you look forward to embracing every day. Our employees love working at Apex, and we want you to love it too. We offer the following benefits:


• Shared upside: receive equity in Apex, letting you benefit from the work you create.  

• Best-in-class healthcare, dental, vision plans. The primary and dependents’ premium is 99%+ covered. 

• Enjoy our comprehensive PTO package, to reset and recharge.

• Competitive 401(k) plan and matching.   

• Paid parental leave. 

• Daily lunch and unlimited snacks!

• Community events like monthly office BBQs, pickleball tournaments, a run club and more!

• Your dream desk setup, tools, and whatever else you need to be your most productive self. 

• A world class office located in Playa Vista, filled with amazing coworkers and social gatherings for you and your family. 

• An opportunity to make a real impact in the aerospace industry.


Equal Opportunity Employer

Apex Technology, Inc. is an Equal Opportunity Employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. Candidates and employees are always evaluated based on merit, qualifications, and performance. We will never discriminate on the basis of race, color, gender, national origin, ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability, or any other legally protected status.

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Average salary estimate

$150000 / YEARLY (est.)
min
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$120000K
$180000K

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What You Should Know About Principal GNC Engineer, Apex

At Apex Technology, we’re on an exciting journey to redefine the future of spacecraft design and operation, and we're looking for a Principal Guidance Navigation and Control (GNC) Engineer to join our team in Los Angeles. As a key player in our mission, you'll have the opportunity to innovate and lead GNC development for our expanding fleet of spacecraft platforms. Imagine being at the forefront of creating satellite buses that support everything from earth observation to communication technologies, enabling humankind’s outreach to the stars. Your role will be hands-on and multifaceted, involving everything from spacecraft concept and algorithm development to close collaboration with diverse teams including Systems, Avionics, and Flight Software. You’ll not only architect and analyze GNC designs but also engage directly with customers to ensure mission success. If you have extensive experience in GNC/ADCS and a passion for utilizing engineering prowess to push the boundaries of aerospace technology, then we’d love for you to join us at Apex in Playa Vista. You’ll be part of a fantastic team with great benefits, including equity options, comprehensive healthcare, and a vibrant workplace culture. Let’s work together to make history and reach new heights.

Frequently Asked Questions (FAQs) for Principal GNC Engineer Role at Apex
What are the key responsibilities of the Principal GNC Engineer at Apex Technology?

As the Principal GNC Engineer at Apex Technology, you will be responsible for leading the GNC design and implementation for various spacecraft missions. Your main duties will include designing flight software, developing spacecraft autonomy tools, selecting GNC components, and overseeing test processes. You will also define fault detection responses and work on simulation and integration of flight software. This role requires collaboration with multiple departments to ensure all GNC subsystems meet the technical requirements necessary for mission success.

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What qualifications do I need to apply for the Principal GNC Engineer position at Apex Technology?

To be considered for the Principal GNC Engineer role at Apex Technology, you should have a BS degree with at least 12 years of relevant industry experience in GNC/ADCS. Advanced degrees are preferred, along with a minimum of 5 years working specifically with spacecraft or satellites. Leadership experience is crucial, as you'll be managing a team, and prior interaction with aerospace customers—either commercial or governmental—is also required.

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What does the work environment look like for the Principal GNC Engineer at Apex?

At Apex Technology, the work environment is designed to foster creativity and collaboration. Based in our Playa Vista headquarters, you’ll enjoy modern office facilities with access to the best tools to enhance your productivity. Our culture encourages social engagement through monthly community events and team-building activities, ensuring that work-life balance is maintained while you thrive in your role as Principal GNC Engineer.

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What types of spacecraft missions does the Principal GNC Engineer work on at Apex Technology?

As a Principal GNC Engineer at Apex, you will work on a diverse array of spacecraft missions, including Low Earth Orbit (LEO), Medium Earth Orbit (MEO), and Geostationary Orbit (GEO) missions, as well as Rendezvous and Proximity Operations (RPOD). This variety provides a unique opportunity to apply your skills across different mission profiles, enhancing both your expertise and contribution to the aerospace field.

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What benefits does Apex Technology offer to the Principal GNC Engineer?

Apex Technology offers a wide range of benefits to its employees, including competitive equity options, extensive healthcare coverage, and a robust PTO package. You can expect a fully-covered primary insurance premium for you and your dependents, a 401(k) plan with matching, paid parental leave, and perks like daily lunches, unlimited snacks, and engaging community events. Our aim is to create an environment where you can excel and make a meaningful impact in the aerospace industry.

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Common Interview Questions for Principal GNC Engineer
Can you describe your experience with guidance navigation and control systems?

In preparing for your interview for the Principal GNC Engineer position, be ready to explain your hands-on experience with GNC systems. Highlight specific projects where you designed GNC algorithms or handled real-time spacecraft operations, specifying the sensors and technologies involved. This will showcase your technical knowledge and practical experience.

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What methods do you use for fault detection and response in spacecraft?

When addressing fault detection and response methods in your interview, discuss your systematic approaches such as utilizing redundancy, real-time monitoring of key systems, and implementing checks and balances. Providing concrete examples from your experience can significantly strengthen your response.

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How do you manage and prioritize multiple projects in your role?

In your response, discuss your project management skills, including how you prioritize tasks based on project timelines and team needs. Emphasize your experience with project management tools like Jira to plan tasks, set milestones, and allocate team resources effectively while ensuring all projects meet their objectives.

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What role does simulation play in your GNC development process?

Be prepared to elaborate on how you utilize simulation for GNC development. Discuss your experience with hardware-in-the-loop testing and Monte Carlo simulations, illustrating how these processes enhance system verification, performance predictions, and the overall reliability of GNC designs.

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Describe a time when you led a team through a challenging project.

In your answer, share a specific example that demonstrates your leadership abilities. Highlight the challenges faced, your approach to guiding the team, and the successful outcome. Use this opportunity to showcase your soft skills like communication and conflict resolution.

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Can you explain your approach to software development and testing in the context of GNC?

Discuss how you manage the development cycle, from algorithm design to testing methodologies. Emphasize the importance of iterative testing and collaboration with software teams to ensure all GNC modules interface smoothly, adding to the robustness and efficiency of spacecraft operations.

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How do you stay updated on advancements in GNC technologies?

In answering this question, mention any relevant journals, conferences, and online platforms you engage with to stay informed about the latest GNC technologies. Illustrate your commitment to ongoing education and professional development in aerospace.

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What is your experience with customer interactions in aerospace projects?

Talk about your experience in interfacing with customers, explaining their needs, and ensuring that projects align with their expectations. Highlight your role in presenting technical information in a way that’s understandable to non-technical stakeholders to help manage project expectations.

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Describe the importance of teamwork in GNC engineering.

In your response, stress the collaborative nature of GNC engineering, where effective communication with Systems, Avionics, and Software teams is crucial. Share examples of how teamwork led to successful project completion and innovative solutions.

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What experience do you have with spacecraft autonomy tools?

Be ready to discuss your hands-on experience with autonomy tools employed for spacecraft operations. Reference any specific tools you’ve developed or implemented, and relate how these tools enhance operational efficiency and mission reliability.

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Full-time, on-site
DATE POSTED
March 9, 2025

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