Sr. Systems Engineer

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

Benefits offered by this job

Paid Time Off

11 paid Holidays

401K with 6% match

Flexible Schedules

Parental Paid Leave

Education and Training Support

Job summary

Leidos LLC in the United States is seeking a Sr. Systems Engineer for the Cyber & Analytics Business Area. You will lead system design, analysis, and integration for Navy Key Management projects, collaborating with internal and customer POCs.

Required are 8+ years in systems engineering, DoD Secret clearance, MBSE, and experience with Linux/UNIX, databases, and Agile methods. This role offers a robust benefits package and potential telework.

Qualifications

• 8+ years in systems engineering or related field; degree may be waived with experience.
• Active Secret DoD security clearance; DoD 8570 Security+ required within 90 days.
• MBSE-based system design, risk analysis, and documentation development.
• Experience with databases (MySQL/Oracle/MS SQL) and Linux/UNIX.
• Knowledge of software design patterns and Agile development.

Responsibilities

• Lead system engineering for Navy Key Management projects across hardware and software.
• Define system architecture, requirements decomposition, and CONOPS.
• Manage requirements, verification, and validation for development teams.
• Prepare technical docs, design specs, data sheets, and user guides.
• Engage in customer meetings and technical interchange activities.

Skills

Model-based Sys Eng

DBMS experience

Linux/UNIX familiarity

Software design patterns

Agile development

Security+ DoD 8570

Technical documentation

Networking knowledge

Python/Perl/Ruby basics

CAMEO (desired)

Education

Bachelor's Degree in System Engineering or related field

Tools

CUCUMBER

MySQL

Oracle RDBMS

MS SQL Server

Job 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 project provides the 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 systems engineering expertise in 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 candidate will be responsible for collaborating with internal technical professionals on a day-to-day basis, and with POCs from customer organizations when necessary.

Responsibilities

• 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 for subsequent use 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.
• 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.

Additional Information

Option to 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 will be required to 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 that demonstrates ability to analyze risks and uncertainties and 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 be required 90 days after hire).

Desired Qualifications

• Software development or shell scripting experience.
• Past experience using 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.
• Past Test Driven Development (TDD) experience a strong plus.
• Experience with CUCUMBER or similar TDD automation framework a plus.

Benefits

• 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

Pay Range

Pay Range $131,300.00 - $237,350.00 The Leidos pay range for this job level is a general guideline only and 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 $17.2 billion for the fiscal year ended January 2, 2026. For more information, visit www.Leidos.com.

Company Culture

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 that disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.

Posting Information

Original Posting: September 10, 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.

Commitment and Diversity

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.

Data Security

Leidos will never ask you to provide payment-related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a Leidos.com email address. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to [e-mail].