Sr. Systems Engineer/Modeler

Leidos has an exciting and challenging opportunity for a Sr. Systems Engineer - Modeler in our Intel Sector-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!  

In this role as Sr. System Engineer - Modeler, you will join a high performing agile team operating within the Scaled Agile Framework (SAFe) methodology. The program supports a broad range of activities, including capability modernization, legacy system integration, Agile software development and modernization, cybersecurity, systems security compliance and certification, COTS integration, test and evaluation, implementation, and operations and maintenance (O&M) activities. The selected individual will work closely with customer technical representatives and senior leadership to support engineering discovery, help shape a multi-year solution, and ensure an integrated approach is applied to achieve customer mission objectives. This role will also involve helping to guide technical teams through the successful development of large-scale, highly complex capability development as part of a broader integrated system development effort.

The selected candidate will collaborate with a team of Model Based Systems Engineers using DODAF and Unified Architectural Framework (UAF) methodologies. This individual must be able to effectively engage with and brief a variety of stakeholders, including company points of contact, customers, partners, and subcontractors, in support of developing comprehensive architecture artifacts. Strong interpersonal and communication skills are essential, as this role required the ability to influence, motivate, and work effectively across diverse Agile development teams. The ideal candidate will be highly collaborative, team-oriented, and focused on advancing the strategic goals of the customer.

Basic Qualifications

• Bachelor’s degree in System Engineering, Engineering Science, Computer Science, or a related field, and at least 12 years of related experience. Additional relevant work experience may be substituted for a degree.

• Must have extensive experience in one or more of the following areas: system architecture, design and development, requirements analysis, data flow design and analysis, network design and implementation, testing, and technical system documentation.

• Must have proven experience with, or strong familiarity with, System Engineering modeling tools and Model Based Systems Engineering using DODAF and/or Unified Architectural Framework (UAF) methodology.

• Must have experience supporting legacy system integration and developing plans and strategies for continuous modernization.

• Must have experience working with government customers and contractor personnel to formulate, review, and execute task plans, while ensuring deliverable are completed in accordance with approved plans.

• Must have a strong background in quality management and process improvement.

• Must have a proven ability to organize, monitor, track, and manage project tasks effectively, meet timelines, and achieve established goals and milestones.

• Must have hands-on experience preparing and delivering clear written and verbal project communications, including recurring status updates, ad hoc technical briefings, and impromptu programmatic updates.

• Must have in-depth experience collaborating with technical teams and customers to develop strategies that enhance performance and reliability.

• Must have demonstrated experience managing multiple projects simultaneously.

• Must have experience mentoring team members to support high performance.

• Clearance Required: Must have TS/SCI with Polygraph.

Preferred Qualifications

• At least 5 years of direct experience with Systems Engineering modeling tools.

• At least 5 or more years of experience applying SAFe for large systems development.

• Experience developing and simulating systems engineering models.

• Experience with, or familiarity with DODAF 2.0.

• Experience transitioning legacy systems to modern architectures.

• Experience delivering briefings to a wide range of stakeholders, including technical teams, program leadership, customers, and executive levels.

• CAMEO experience is a plus.

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CONMD

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:

July 27, 2026

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.