Top Principal Engineer Jobs in Los Angeles, CA

Leads electrical architecture and custom PCB development for a portable nuclear microreactor. Responsibilities include mixed-signal and analog design, power distribution, high-speed routing, signal and power integrity, schematic capture, layout, board bring-up, validation, qualification, and field deployment. The role provides technical leadership, mentors electrical engineers, manages hardware risks, and collaborates with firmware, FPGA, DSP, and systems teams. Experience with high-reliability or harsh-environment electronics is required.

Leads the design, development, testing, deployment, modernization, and sustainment of secure web applications supporting manufacturing and operations. Develops with C#, ASP.NET Core, and SQL Server; guides architecture and technical direction; participates in Agile delivery; resolves defects and performance issues; collaborates with stakeholders and cybersecurity teams; and mentors junior and mid-level developers. The role supports legacy .NET modernization, integrations, secure development practices, and mission-critical software solutions.

Lead quality engineering across streaming, data, and advertising systems, driving test automation strategy, architecture, and mentorship while ensuring product quality and operational efficiency.

Designs, develops, integrates, tests, and qualifies advanced hardware subsystems for tactical applications. Responsibilities include decomposing systems into CPUs, GPUs, FPGAs, and software; defining performance, interface, voltage, signaling, and cabling requirements; conducting laboratory integration with electronic test equipment; interpreting system requirements; performing technical reviews; and collaborating with systems, software, digital engineering, and integration teams.

Lead the architecture and development of high-throughput streaming infrastructure processing over one million messages per second with sub-second latency. Responsibilities include scaling real-time computation, improving caching, designing message deduplication, enabling zero-downtime deployments, delivering customer-focused projects, shaping the technical roadmap, and mentoring engineers.

Drive electrical design for high-speed digital communication systems, RF and mixed-signal electronics, complex power systems, and multilayer PCBs. Own board development from architecture and component selection through schematic capture, layout, bring-up, debugging, testing, and production. Collaborate with hardware, software, RF, antenna, FPGA, firmware, and manufacturing teams while leading technical efforts and mentoring engineers.

Leads end-to-end mechanical design, integration, production transition, and sustainment of missile and UAV launcher systems for mobile ground and maritime platforms. Responsibilities include mechanical architecture, electro-mechanical interfaces, environmental and structural protection, deployment mechanisms, safety features, military standards compliance, platform integration, supplier coordination, testing, and resolving field issues. The role requires extensive aerospace or defense experience, launcher-system expertise, ruggedized hardware design, CAD proficiency, and the ability to obtain a U.S. security clearance.

Lead mechanical design and integration of ruggedized electronics, effectors, structures, enclosures, and mechanisms into ground- and sea-mobile aerospace and defense platforms. Own the full product lifecycle from architecture and CAD through analysis, prototyping, qualification, production transition, and sustainment. Provide technical leadership, conduct structural and thermal assessments, manage interface documentation, support customer and supplier coordination, and resolve complex cross-disciplinary integration issues.

Performs systems engineering for the Sentinel program, including technical planning, requirements development and decomposition, requirements verification, traceability, MBSE modeling, interface coordination, and technical reviews. Supports Guidance, Navigation, and Control activities, architecture, verification, design and test coordination, and major program events. Collaborates with internal teams, customers, suppliers, and subcontractors while preparing technical presentations and maintaining system documentation.

The Principal Engineer will lead the design and delivery of core platform capabilities, focusing on scalable systems, AI application, and mentoring engineers while driving architectural decisions and improving operational systems.

Leads configuration management across the full defense engineering lifecycle. Manages CPLM processes, change control boards, CDRL/SDRL deliverables, Cameo MBSE model baselines, document and data version control, program baselines, audits, compliance, reporting, and stakeholder coordination. Supports engineering teams, subcontractors, customers, and program leadership while improving configuration management processes and data integrity.

Define electrical and firmware system architectures for access control products, develop hardware and firmware proof-of-concepts, perform board bring-up and hardware/software interface validation, and debug system-level issues using bench tools. Collaborate with electrical, mechanical, industrial design, cloud, and mobile teams, while coordinating technical execution with international manufacturing and development partners.

Lead research, development, maturation, and production transition of advanced III-V semiconductor technologies, including GaN and InP transistor devices. Responsibilities include millimeter-wave transistor design and simulation, experimental device development, root-cause analysis, RF characterization, semiconductor processing, and collaboration with process, circuit, and test engineers. The role requires semiconductor device physics expertise, laboratory work, multidisciplinary leadership, and advancement of microelectronics products from early R&D through manufacturing.

Lead the architecture, development, deployment, and reliability of cloud-based customer experience platforms using AWS, Genesys Cloud, and Salesforce Service Cloud. Design integrations, data pathways, CI/CD pipelines, and infrastructure automation while ensuring security, compliance, scalability, and performance. Serve as a technical subject matter expert, guide global agile teams and vendors, coach engineers, establish DevOps practices, and troubleshoot critical production issues.

Provides architectural leadership for complex CX orchestration platforms built on AWS, Genesys Cloud, and Salesforce. Designs integrations and distributed systems, establishes engineering standards, leads governance and technical roadmaps, resolves high-impact production issues, evaluates technologies, and mentors senior engineers and technical leaders. The role influences enterprise architecture, risk mitigation, platform strategy, and cross-functional technical decisions.

Supports systems engineering for the NGP Ground program by reviewing and signing verification evidence in DOORS, developing and witnessing requirements-based tests, preparing contractual deliverables, and coordinating with subject matter experts. The role contributes to product strategy, backlog management, iteration planning, requirements development, and verification maturity. It requires full-time onsite work, an active Secret clearance, and collaboration across engineering teams to meet customer and program delivery commitments.

Leads design, analysis, testing, qualification, and flight development of liquid rocket thrusters. Designs injectors and combustion chambers, integrates valves and feed systems, analyzes performance and stability, supports hot-fire campaigns, investigates failures, develops engineering tools, mentors engineers, and coordinates cross-functional propulsion hardware development.

Designs and analyzes model-based navigation software and advanced navigation and timing technologies. Responsibilities include navigation performance analysis in laboratory and flight-test scenarios, sensor-fusion and state-estimation algorithm development, sensor synchronization and calibration, data analysis, stakeholder communication, technical presentations, and collaboration with program teams and customers. The role supports critical defense systems and requires onsite work in Woodland Hills, California, U.S. citizenship, and eligibility for a Secret clearance.

Designs and implements model-based navigation software and advanced navigation and timing technologies. Responsibilities include analyzing navigation performance in laboratory and flight tests, developing sensor-fusion and state-estimation algorithms, evaluating inertial navigation data, synchronizing and calibrating sensors, communicating results to stakeholders, and presenting technical work. The role supports critical defense systems and requires onsite work, U.S. citizenship, and the ability to obtain a Secret clearance.

Lead the creation of a hardware-in-the-loop laboratory test and integration platform from scratch. Design electrical systems, emulate plant control environments, define interface requirements, establish verification procedures, automate testing, capture data, and troubleshoot integrated hardware. Collaborate across software, controls, simulation, and electrical engineering teams while independently shaping requirements and commissioning test platforms.

Leads complex infrastructure migrations, systems integration, enterprise troubleshooting, security tool deployments, infrastructure-as-code automation, and performance engineering. Investigates outages using packet analysis, log correlation, and kernel debugging across Windows, Linux, and Cisco environments. Requires advanced network and systems expertise, federal or defense experience, high-level certifications, a technical degree, and Secret or potentially Top Secret clearance.

Develops and delivers systems engineering products for aerospace programs. Responsibilities include requirements development and allocation, verification and validation planning, interface definition, technical specifications, interface control documents, configuration management, stakeholder coordination, and engineering artifact reviews. The role requires collaboration across integrated product teams and communication with technical and non-technical audiences. Candidates must hold an active Secret clearance and be able to obtain Special Access Program access.

Leads the design, development, testing, and implementation of electrical systems and circuit components for electric aircraft and eVTOL applications. Responsibilities include feasibility studies, technical analysis, project leadership, budget and resource management, circuit design, BOM generation, simulation, troubleshooting, fault isolation, compliance, and documenting test and investigation results. Provides technical guidance to engineering teams and collaborates with cross-functional stakeholders.

Leads Agile/Scrum teams developing, integrating, testing, and deploying mission-critical mission-planning software. Owns CI/CD pipelines, build environments, installation and verification activities, requirements-to-test traceability, troubleshooting, risk remediation, and technical support for program reviews and proposals. Collaborates with systems engineering and program management, supports customer-facing activities, mentors engineers, and drives automation and continuous improvement. The role is fully on-site in Manhattan Beach, California, and requires an active Secret clearance with SAP access eligibility.

Performs structural and mechanical analysis of military avionics and related systems, including static, dynamic, stability, damage tolerance, fatigue, thermal, and bolted-joint analyses. Develops and evaluates finite element models in ANSYS, calculates structural margins, reviews designs and requirements, supports testing and nonconformance reviews, documents analysis methods, and presents findings in customer design reviews. This is a fully onsite role supporting defense programs.