Senior Digital Design Engineer

Job Description

This position requires onsite in Tucson, AZ and an active Secret security Clearance. Candidates who do not hold this clearance are not eligible for hire.

Solidus is seeking a skilled and collaborative Digital Design Engineer to join our defense engineering team. In this role, you will own the full development lifecycle—including design, analysis, simulation, test, and integration—of critical digital electronic modules and Circuit Card Assemblies (CCAs) for missile applications.

• Architect and design complex, high-reliability CCAs and digital electronic modules
• Lead hardware through initial schematic capture, layout routing oversight, simulation, component selection, and prototype laboratory testing
• Collaborate with systems, software, and test teams to integrate hardware into larger missile subsystems
• Develop test plans and perform hands‑on laboratory debugging using oscilloscopes, logic analyzers, and signal generators
• Generate technical design packages, worst‑case circuit analyses (WCCA), and engineering change orders
• Other duties as assigned

• 8 years of experience with a Bachelor's or 6 years of experience with a Master's degree in Electrical Engineering, Computer Engineering, or a related STEM field
• Hardware design experience (aerospace or defense industry preferred)
• Strong collaborative mindset with excellent written and verbal communication skills for team-based environments
• Proven experience designing digital systems embedded with microprocessors, microcontrollers, and FPGAs
• Direct experience implementing and routing memory architectures such as DDR3/DDR4, Flash, and SRAM
• Practical design and layout familiarity with high‑speed protocols including PCIe and Ethernet
• Experience implementing board-level communications via I2C, SPI, and UART
• Proficiency with industry-standard ECAD tools for schematic capture and PCB layout (e.g., Altium Designer, Cadence Allegro, or Mentor Graphics/Siemens Xpedition)
• Cultural fit amongst a collaborative team environment

Benefit selection, customer contractual specifications, relevant work experience, skills, competencies, certifications, and clearance status will influence the final salary.

Solidus offers you an exciting opportunity to tackle the nation's greatest challenges applying innovation and expertise to produce cutting-edge results that have a long-lasting impact. We offer outstanding benefits, generous PTO and much more! Apply today to learn why Solidus has a 4.9/5 Star rating on Glassdoor!

Solidus is an Equal Opportunity Employer and provides equal employment opportunities regarding all terms and conditions of employment to all employees and qualified applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws.

The Company will ensure that individuals with disabilities are provided reasonable accommodation to participate in the job application and interview process, to perform essential job functions, and to receive other benefits and privileges of employment. Please contact us to request an accommodation.