Systems Modeler (DOD/Navy)

NSS; Washington (District of Columbia); On-site; USD 90,000 - 130,000; Full time

Job summary

NSS seeks a Systems Modeler to develop, build and maintain MBSE products supporting a Navy customer in Washington, DC. Onsite full-time with a Secret clearance preferred or sponsorable. The role emphasizes parametric SysML modeling, dynamic behavior, and traceability of requirements and designs.

The candidate will leverage Cameo Systems Modeler, MATLAB/Simulink, and Modelica to build executable models and support engineering analyses and trade studies for decision-makers.

Qualifications

• Bachelor's degree required.
• At least 3 years in systems engineering, MBSE, or systems modeling.
• Hands-on SysML parametric modeling experience.
• Experience with dynamic system behavior and simulation-based methods.

Responsibilities

• Develop and maintain SysML models representing system structure, behavior, and interfaces using Cameo or MBSE tools.
• Build parametric models and constraint blocks to capture relationships and design trade-offs.
• Model dynamic system behavior using state machines, activity diagrams, sequence diagrams, and simulations.
• Represent time-dependent and state-driven behavior of complex systems including control loops and mode transitions.
• Support trade studies and engineering analyses via parametric and behavioral models.
• Integrate SysML models with MATLAB/Simulink or Modelica to validate dynamics.
• Maintain traceability between requirements, functions, interfaces, and model elements.
• Support architecture products including mission threads, use cases, activity diagrams, and requirements architectures.
• Apply modeling conventions and CM practices established by lead architect or model owner.
• Participate in technical reviews, architecture working groups, and stakeholder meetings to present models.
• Document modeling assumptions, methods, and results for reports and briefings.

Skills

SysML modeling

Parametric modeling

Cameo Systems Modeler

Traceability

Education

Bachelor's degree

Tools

MATLAB/Simulink

Modelica

Job description

Currently seeking a Systems Modeler to develop, build and maintain model-based systems engineering (MBSE) products supporting the Navy customer.

Location:

Onsite full time at a Headquarter office located near the Navy Yard in Washington, DC.

Clearance:

Active Secret preferred, can sponsor if needed. US Citizenship required.

About the Position:

The Systems Modeler will build structural and behavioral models — with particular emphasis on parametric modeling and the representation of dynamic system behavior — that support engineering analysis, trade studies, and program decision-making.

The successful candidate will be a detail-oriented modeler who can translate complex system requirements and physical relationships into precise, executable SysML models. The role requires strong parametric modeling skills and the ability to accurately represent dynamic system behavior, producing traceable models that support engineering analyses and decisions made by program and technical leadership.

Primary Responsibilities

• Develop and maintain SysML models representing system structure, behavior, and interfaces using Cameo Systems Modeler or comparable MBSE tools.
• Build parametric models and constraint blocks to capture engineering relationships, performance parameters, and design trade-offs.
• Model dynamic system behavior using state machines, activity diagrams, sequence diagrams, and simulation-driven approaches.
• Represent time-dependent and state-driven behavior of complex systems, including control loops, mode transitions, and system responses to inputs and disturbances.
• Support trade studies and engineering analyses by executing parametric and behavioral models and interpreting results.
• Integrate SysML models with simulation and analysis tools (e.g., MATLAB/Simulink, Modelica) to validate dynamic system behavior.
• Maintain traceability between requirements, functions, interfaces, and model elements.
• Support development of architecture products, including mission threads, use cases, activity diagrams, and requirements architectures.
• Apply modeling conventions, naming standards, and configuration management practices established by the lead architect or model owner.
• Participate in technical reviews, architecture working groups, and stakeholder meetings to present and validate models.
• Document modeling assumptions, methods, and results to support technical reports and briefings.

Qualifications

• Bachelor's degree
• At least 3 years of experience in systems engineering, MBSE, or systems modeling.
• Hands-on experience building parametric models (parametric diagrams, constraint blocks) in SysML.
• Experience modeling dynamic system behavior using state machines, activity diagrams, sequence diagrams, or simulation-based methods.
• Experience with Cameo Systems Modeler OR a comparable MBSE platform.
• Working knowledge of systems engineering lifecycle activities, including requirements, architecture, and verification.
• Ability to translate engineering requirements and physical system relationships into structured, executable models.
• Strong analytical and problem-solving skills with close attention to model accuracy and detail.