Top Tech Jobs & Startup Jobs in Los Angeles, CA

Design and integrate mechanical aspects of electrical components and subsystems, including enclosures, brackets, mounts, harness routing, and thermal management. Create CAD models and drawings in Siemens NX, perform structural and thermal analyses, support material and fastener selection, and contribute to system integration, troubleshooting, validation, manufacturing, and testing. The role requires collaboration across mechanical, electrical, software, and systems engineering disciplines in a fully onsite, high-reliability hardware environment.

Own operational projects from planning through closeout, including staffing, budgeting, subcontractor management, stakeholder coordination, execution, and risk reporting. Support program leaders and site leads on reactor testing, delivery, customer deployment exercises, and other operational initiatives. The role requires onsite work in El Segundo when not traveling, extended hours as needed, and travel up to 20% annually.

Owns the mechanical architecture, design, analysis, integration, testing, and production readiness of high-speed turbomachinery in a 1 MW closed-loop Brayton cycle nuclear power system. Leads rotor dynamics, structural integrity, bearings, seals, shafting, tolerancing, and system interfaces while supporting hardware assembly, troubleshooting, validation, and root-cause analysis. Serves as the technical authority for turbomachinery without direct people-management responsibility.

Owns the mechanical architecture, design, analysis, testing, and production readiness of high-speed turbomachinery in a 1 MW closed-loop Brayton cycle nuclear power system. Responsibilities include rotor dynamics, structural integrity, bearings, seals, tolerancing, thermal and spin testing, hardware troubleshooting, subsystem integration, supplier engagement, and technical leadership across engineering and manufacturing teams.

Designs and develops critical reactor structures, including shielding, container, graphite, and metallic systems. Performs trade studies, material selection, thermomechanical and dynamic structural analyses using hand calculations and finite element tools. Leads assembly, manufacturing, integration, testing, BOM management, supplier development, schedules, and subsystem FMEA. Collaborates across engineering disciplines and works onsite in El Segundo, with extended hours as needed.

Design and develop critical structures for commercial reactor systems. Responsibilities include structural analysis, developing designs, and overseeing manufacturing processes.

Own end-to-end accounts payable operations, including high-volume invoice processing, payment runs, vendor management, reconciliations, controls, compliance, and audit support. Build scalable AP processes and documentation, optimize QuickBooks, ION, and Ramp, and lead AP requirements for ERP selection, implementation, and migration. Partner with Supply Chain and Finance, support tax reporting, and train employees on AP policies and tools.

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.

Support design, build, and maintenance of NI PXI-based HIL test benches. Configure test hardware, integrate with Digital Twin, execute test procedures, collect and document data, troubleshoot hardware, and assist senior engineers with electrical integration and harness assembly.

Leads daily accounting operations, month-end and year-end close, financial reporting, reconciliations, fixed assets, inventory accounting, internal controls, and audit support. Manages GAAP compliance, accounting systems and process improvements, collaborates cross-functionally, and mentors junior accounting staff. The role is fully onsite in El Segundo and may require extended hours or weekends.