Senior Linux Systems Engineer Jobs in Riverside, CA

Senior Systems Engineer – Secret Clearance | Riverside, CA 

Cambridge International Systems, Inc. 
Join a dynamic global team united by shared values: commitment, integrity, and perseverance. At Cambridge, you’ll work alongside top talent worldwide, tackling some of today’s most complex and critical challenges in defense and security. 

We are currently seeking a Senior Systems Engineer to support operations in Riverside, CA. This position is contingent on contract award, with an expected start date in July 2026. This is a full-time CONUS/OCONUS position requiring an active DoD Secret clearance.  

This position may be subject to the Service Contract Labor Standards Act (SCLS)/Service Contract Act (SCA). 

The base salary range for this role is $92K - $150K annually, depending on geographic location and experience. The final offer will be based on relevant experience, skills, internal equity, and market data.  

What You’ll Do 

As a Senior Systems Engineer, you will play a critical role in evaluating, analyzing, and integrating complex communications systems and infrastructure to ensure interoperability, performance, and reliability across mission-critical environments, that serve U.S. government missions overseas/the Cambridge corporate office.  You will: 

• Evaluate and analyze C4I communications capabilities, including system performance, interoperability, and operational effectiveness 

• Assess C4I infrastructure capacity and identify improvements to support mission requirements 

• Analyze integration of radar, sensor inputs, and IP-based communications systems 

• Support engineering efforts related to system upgrades, enhancements, and technology refresh initiatives 

• Troubleshoot complex system issues across AMOSS, ISR, and telecommunications environments 

• Provide technical recommendations to improve system reliability, scalability, and performance 

• Support configuration management and system baseline control processes 

• Collaborate with engineering, operations, and maintenance teams to ensure seamless system integration 

• Support installation, testing, and validation of new systems and enhancements 

• Participate in technical reviews, engineering assessments, and mission planning activities 

• Ensure compliance with security requirements, operational procedures, and system standards 

What You’ll Bring 

Required Qualifications: 

• Education & Experience:  

  • Bachelor’s degree in Engineering, Computer Science, Information Technology, or related field; experience may substitute + 10 years of relevant experience 

  • Evaluating and analyzing C4I communications capability and interoperability 

  • Evaluating and analyzing C4I communications infrastructure capability, capacity, and interoperability 

  • Evaluating and analyzing the installation of C4I serial and IP radar and other sensor input 

  • Evaluating and analyzing network cabling and infrastructure to ensure compliance with industry standards, configuration requirements, and policy 

  • Conducting bandwidth analysis of network and communications infrastructure to ensure efficient and stable operations 

  • Overseeing and verifying system, network, and communications wiring diagrams and data flow technical documentation 

• Technical Expertise:  

  • Project management tools such as MS Project or equivalent 

  • Collaboration tools such as Teams and SharePoint 

• Certifications: 

  • Must have a current and active DoD Secret security clearance. 

  • Proficient with modern IT tools and infrastructure technologies 

Travel & Passport 

• Both CONUS and OCONUS by motor vehicle and/or air travel may be required; some overnight stays possible.   

  • OCONUS locations include:  

    • Aguadilla, Puerto Rico 

• Must have an active passport to support OCONUS travel and/or living requirements. 

Work Environment 

• Compliance with vaccination and medical requirements for TDY/OCONUS roles as per Vaccine Recommendations by AOR | Health.mil. 

• This position requires working in a stressful environment, dealing with conflict, working under pressure and with strict deadlines, focus and attention to detail 

Office setting: 

• Primarily an office-based role in Riverside, CA 

• Standard desk/computer work with flexibility for walking and movement on site. 

• Must be able to work in an office environment, sitting at a desk, looking at a computer for most of the workday. 

• Work is physically comfortable; the employee has discretion about sitting, walking, standing, etc. 

• May be required to travel short distances to offices/conference rooms and buildings on site.   

Background & Security 

• Employment is contingent upon successful background investigation 

• Alcohol and Drug screening may be required for federal contract compliance 

Benefits & Perks 

We believe in investing in our team—both professionally and personally: 

• Medical, dental, vision, life, accident, and critical illness insurance 

• 401(k) immediate vesting and match 

• Paid time off and company holidays 

• Generous tuition & training support 

• Relocation assistance 

• Sign-on and performance-based bonuses 

• Employee referral program 

• Access to Tickets at Work, EAP, wellness initiatives, and more 

Join Us 

If you're driven by mission, technology, and teamwork—we want to hear from you. Cambridge is growing, and this position is just one of many opportunities on our global team. Know someone perfect for the role? Referrals are welcome—both employees and non-employees may qualify for a bonus. 

Apply today and help shape the future of secure cloud computing for national security. 

About Cambridge International Systems 

At Cambridge, we recognize innovation and agility grow through teamwork. By working collaboratively, listening proactively, and engaging across functions we create solutions that build on the best ideas our employees bring to the table. We are committed to one another, to persevere in order to get the job done, and to do so with integrity every time. Learn more at www.cbridgeinc.com.  

We are an equal opportunity employer.  Applicants and employees are considered for positions and are evaluated without regard to any protected status under applicable law or other similar factors that are not job-related.  We encourage all qualified individuals to apply for employment.  Selected applicants may be subject to a background investigation and/or education verification. 

We provide reasonable accommodation for qualified individuals with disabilities in accordance with federal, state, and local law.  If you require a reasonable accommodation to participate in the application process or to perform the essential functions of the position, please contact our Recruiting Team at recruiting@cbridgeinc.com.   

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