Electrical Digital Design Engineer 4

Legion Technical Solutions LLC is seeking an experienced Electrical Digital Design Engineer to lead end-to-end development of complex digital electronics for defense and aerospace applications. This onsite role in Tucson, AZ focuses on designing, analyzing, simulating, verifying, testing, and integrating digital electronic modules and circuit card assemblies, from early requirements through production transition.

Responsibilities

• Lead the design and development of complex digital electronic circuits, modules, and multi-assembly hardware systems.
• Advance hardware designs from initial requirements and architectural concepts through detailed design, verification, integration, and production.
• Create digital hardware architectures, including block diagrams, circuit designs, and detailed schematics.
• Design sophisticated multilayer PCBs and circuit card assemblies that incorporate processors, FPGAs, memory devices, and high-speed digital interfaces.
• Perform circuit analysis, simulation, and design verification to support electrical performance, reliability, and compliance with system requirements.
• Coordinate with PCB layout engineers to define and implement critical design constraints.
• Conduct component selection and technical trade studies, including engineering evaluations.
• Support integration of hardware with FPGA firmware and embedded software.
• Develop and execute hardware test plans, perform laboratory checkout, and troubleshoot complex electronic systems.
• Collaborate with systems, software, manufacturing, and test engineering teams to transition designs into production.
• Provide technical guidance, participate in design reviews, and contribute to continuous improvement in engineering processes and product performance.

Required Qualifications

• Minimum 8 years of professional experience developing and designing electronic circuits and multi-assembly electronic systems.
• Proven ability to independently take a digital hardware design from requirements or block diagrams through complete development, verification, and integration.
• Strong experience across PCB design processes, including schematic capture, circuit analysis, simulation, and design verification.
• Demonstrated expertise developing complex multilayer circuit card assemblies and applying electrical and physical design constraints.
• Experience designing digital electronic hardware that includes processors, FPGAs, memory, and related interfaces.
• Familiarity with FPGA or embedded software development, with experience supporting hardware programs from development through production.
• Experience defining and analyzing requirements, developing hardware architectures, selecting components, and performing engineering trade studies.
• Hands-on experience with laboratory test equipment, hardware checkout, troubleshooting, and integration.
• Strong analytical, problem-solving, technical communication, and cross-functional collaboration skills.

Technologies

• FPGA
• embedded software
• PCIe
• Ethernet
• I2C
• SPI
• UART

Preferred Qualifications

• Experience designing digital electronics for aerospace, defense, missile, or other high-reliability applications.
• Familiarity with high-speed digital interfaces and communication protocols, including PCIe, Ethernet, I2C, SPI, and UART.
• Experience with signal integrity, power integrity, and high-speed PCB design considerations.
• Proficiency with industry-standard schematic capture, PCB design, and electronic simulation tools.
• Experience supporting hardware qualification, production readiness, manufacturing troubleshooting, and design improvements.
• Demonstrated technical leadership in complex electronic hardware development programs.

Benefits

• Competitive salary
• Health insurance
• Paid time off
• Relocation bonus

Role Details

• Location: Tucson, AZ | On-Site
• Salary: USD 125,000 - 140,000 per year
• Experience: Minimum 8 years