This Systems Engineering (SE) opportunity on the U.S. Navy’s Service Management, Integration, and Transport (SMIT) will allow participation on a high-visibility DoD program that provides engineering support to the Naval Enterprise Network (NEN), the largest information technology (IT) network in the world. This position will provide many opportunities to challenge and grow your skills as a Systems Engineer.

A successful candidate will use Model Based Systems Engineering (MBSE) tools, the System Modeling Language (SysML), and the Object-Oriented Systems Engineering Methodology, tailored for the SMIT Project to build the Naval Enterprise Network model. This modeling will achieve the goal of creating, maintaining, updating, modernizing, and refreshing the capabilities and components of NEN. This position is a member of a small, well-connected, and dynamic team that is responsible for providing the core competency for MBSE, SysML, MBSE processes, and Cameo Systems Modeler (CSM) and other MBSE Tool Suites across the entire SMIT program. This candidate is expected to be hands-on within the model and MBSE tools.

The candidate will utilize an agile MBSE approach that provides rigor, repeatability, and flexibility to support the needs of stakeholders, including our customer and the SMIT team. This position will apply MBSE methods to create and manage the NEN System Model, using SysML and aligned with the NAVWAR EA Profile, enabling support of all SE use cases across the systems engineering lifecycle to realize the full projected value of MBSE.

The effective candidate will create, mature, and maintain Service-level and System-level Requirements within CSM by following a structured process. This includes using the CSM tool to create all relevant Derived, Refined, Verified, and Satisfied relationships to the other elements within the NEN model. The Candidate will also use CSM to build abstract, logical High-Level Design (HLD) architecture of the System as well as implementation-specific, physical, detailed Low-Level Design (LLD) architecture of the Solution. In order to build and maintain the Requirements and Architecture, the successful Candidate will need to engage and collaborator directly with Leidos Domain Architects and other Subject Matter Experts (SME’s) regularly to ensure that the NEN model is accurate.

A successful candidate will initiate, curate and deliver testing artifacts for peer reviews with internal and external stakeholders, capturing and adjudicating feedback to closure so that every published deliverable satisfies SMIT standards for rigor and accuracy. The ideal candidate combines strong technical writing skills and meticulous attention to detail with proven experience in test planning, requirements traceability, and cross-functional collaboration in enterprise IT or network environments.

Primary Responsibilities

Develop and manage the System model to support performance of technical analyses for a subsystem or system elements- developing technical solutions, preparing trade studies, decomposing the solution into system-level requirements.

Create, maintain, and deliver accurate and robust Requirement Traceability Matrices, High-Level Designs, and Low-Level Designs within the CSM NEN Model, that meet the Governance Team standards, while also initiating and curating informal and formal peer-reviews with internal and external stakeholders to ensure that the published deliverable meets the SMIT standards for rigor and accuracy.

Create, deliver, and execute accurate and robust Test Plans, Test Procedures, and Test Reports within the CSM NEN Model, that meet the Governance Team standards, while also initiating and curating informal and formal peer-reviews with internal and external stakeholders to ensure that the published deliverable meets the SMIT standards for rigor and accuracy.

Develop models of system requirements, architecture/design, interfaces, behavior, and simulations using No Magic’s Cameo Systems Modeler (CSM) and suite.

Provide foundational patterns and cross-cutting model elements to support creation of “to-be” models to capture the structure, behavior, and configuration settings that help assess the impacts/implications of change.

Translate systems engineering processes from traditional document-based system engineering efforts to delivery of model-based work products to customers as required.

Be an ambassador for MBSE by being able to speak to the benefits of this approach as compared to the DSEM process.

Collaborate and coordinate with external customers, management, subcontractors, vendors, and other engineering disciplines.

Lead small, somewhat complex MBSE-related activities as requested (e.g., modeling MBSE processes, developing patterns, test cases, and simulations based on input from domain experts, identifying MBSE tool integration requirements).

Support the team by assisting the Lead Systems Engineer with MBSE process updates, Proposal estimation, and by providing training to newer models as needed.

Report out on modeling status to the Government occasionally as directed by the Lead Systems Engineer.

Basic Qualifications

Requires B.S. Degree and 4 or more years of prior relevant experience or M.S. with 2 or more years of prior relevant experience (in System Engineering, Software Engineering, or related engineering discipline) from an accredited college or university.

Must be a U.S. Citizen and have a Secret clearance.

Understanding of Model-Based Systems Engineering (MBSE) practices.

Experience applying MBSE methods, tools, and frameworks to develop rigorous specifications and designs of commercial and/or DoD systems/components.

Able to synthesize knowledge from multiple domains to apply to new, complicated problems.

Experience working in large enterprise operations environments that include: identification, development, analysis of enterprise IT activities, solutions/risk mitigations, artifacts and migrations.

Experience applying systems engineering fundamental concepts, processes, practices, and procedures on technical assignments.

Experience in collaborating with other enterprise technologists both internal and external to resolve complex technical issues.

Knowledge of MBSE tools such as:
-No Magic’s Cameo Systems Modeler, Collaborator, Teamwork Cloud.
-SysML.

Must be able to work collaboratively and remotely in a team environment.

Must be able to work independently to develop innovative modeling approaches and optimizations.

Communication skills in leading discussions and interacting with Government customers, colleagues, and senior leadership.

Some travel may be required.

Preferred Qualifications

Experience working on integrated teams, assisting other engineers and disciplines with little to no supervision.

Defense industry Systems Engineering experience

IT Network Systems Engineering experience

Familiarity with the following tools:
- Atlassian JIRA
- Product Lifecycle Management Tools

NGEN

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:

October 22, 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 $87,100.00 - $157,450.00

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 Us

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.

Pay and Benefits

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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.

Systems Engineer