Sr. Systems Engineer

Leidos; San Diego (CA); Hybrid; USD 131,000 - 237,000; Full time

Job summary

Leidos is seeking a Sr. Systems Engineer for the Navy Key Management portfolio in the INTEL Sector. The role requires leading system engineering activities, developing architectures, and collaborating with customer POCs to ensure requirements are met.

The candidate must have 8+ years of SE experience, a Secret DoD clearance, and familiarity with ML/DB concepts, Linux/UNIX, and Agile practices. On-site work with some telework is possible.

Qualifications

• 8+ years of experience in systems engineering or related field.
• US citizenship and active Secret DoD security clearance.
• Model-based systems engineering experience.
• Experience with database management software (MySQL, Oracle, SQL Server).
• Familiarity with Linux/UNIX operating systems.
• Knowledge of software design patterns and Agile methodologies.
• DoD 8570 approved Security+ certification (required within 90 days).

Responsibilities

• Lead system engineering, hardware and software analysis for the Navy Key Management portfolio.
• Define and apply SE processes to meet customer requirements.
• Manage requirements decomposition, allocation, verification and validation.
• Develop System Architecture, CONOPS and use-case scenarios.
• Engage in customer meetings and technical interchange activities.
• Produce technical documentation including manuals, specs and data sheets.
• Possibility to work a 9/80 schedule and travel to customer facilities up to 5 days a week with some teleworking.

Skills

Security clearance

DoD clearance

MBSE

Risk analysis

System engineering

Education

BSc in Systems Eng / CS / IS

Tools

MySQL

Oracle RDBMS

Microsoft SQL Server

Job description

Description

Leidos has a new and exciting opportunity for a Sr. Systems Engineer in our INTEL Sector's Cyber & Analytics Business Area (CABA). Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management. At Leidos, we offer competitive benefits, including Paid Time Off, 11 paid Holidays, 401K with a 6% company match and immediate vesting, Flexible Schedules, Discounted Stock Purchase Plans, Technical Upskilling, Education and Training Support, Parental Paid Leave, and much more. Join us and make a difference in National Security!

Job Summary:

This projectprovidesthe full range of software systems design, analysis, integration, verification, and validation activities in support of the Navy’s Key Management project portfolio.The selected candidate will provide systemsengineeringexpertisein the following areas: system architecture and design; development and integration; requirements analysis, data flow analysis; network design and implementation; test/verification and validation; and documentation for the system.The selected candidatewillbe responsible forcollaborating with internal technical professionals on a day-to-day basis, and with POCs from customer organizations when necessary.

Additionalposition responsibilities alsoinclude:

• Lead system engineering, hardware, and software analysis to support the Navy’s Key Management project portfolio.

• Define and apply systems engineering processes to develop systems that meet customer requirements.

• Manage requirements, including decomposition, allocation, verification, and validation forsubsequentuse by the development and test teams.

• Define and develop System Architecture, CONOPS, and use case development using systems engineering methodologies.

• Participate and lead discussions at customer meetings, working groups, and technical interchange meetings associated with the work performed in this project.

• Required to research, design, write, and review a wide range of technical documentation that will include but not be limited to: technical manuals, design specification documents, interface requirements specification, system user guides, reference manuals, installation guides, and data sheets that may be required to assist with the design, integration, testing, and fielding of the system; will provide project briefing materials upon request.

• Optionto work a 9/80 work schedule (i.e., 9 hour days, then work 8 hours on first Friday and off the second Friday)

• The selected candidate willbe requiredto work at the customer facilities up to 5 days a week. Some teleworking may be available.

Required Qualifications:

• Bachelor's Degree in System Engineering, Computer Science, Information Systems, Engineering Science, Engineering Management, or a related field, with 8+ years of experience. Will consider experience in lieu of a degree.

• Position requires US citizenship and an active Secret DoD security clearance.

• Experience thatdemonstratesability to analyzerisks and uncertaintiesand ability to navigate projects through established processes.

• Model based systems engineering experience.

• Experience with database management software, such as MySQL, Oracle RDBMS, and Microsoft SQL Server.

• Familiarity with operating systems, such as Linux and UNIX.

• Understanding complex system development methods.

• Experience with technical documentation development.

• Knowledge of software design patterns.

• Knowledge of Agile Development methodologies.

• DoD 8570 approved security certification (i.e., Security +) (Will berequired90 days after hire).

Desired Qualifications:

• Software development or shell scripting experience.

• Past experienceusing CAMEO a plus.

• Excellent scripting skills with knowledge of programming languages, such as Perl, Ruby, and Python.

• Good knowledge of networking protocols, such as TCP, IP, and OSI models.

• PastTest DrivenDevelopment (TDD) experience a strong plus.

• Experience with CUCUMBER or similar TDD automation framework a plus.

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.

Original Posting

August 20, 2026

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range

Pay Range $131,300.00 - $237,350.00

The Leidos pay range for this job level is a general guideline onlyand not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

About Leidos

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www.Leidos.com.

Pay and Benefits

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at www.leidos.com/careers/pay-benefits.

Commitment to Non-Discrimination

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.