Mission-Critical Systems Engineer (DoD) SysML & Requirements

SyMec LLC; Phoenixville (Chester County); On-site; USD 115,000 - 187,000; Full time

Benefits offered by this job

Health & Disability Insurance

401(k) with company match

3 weeks paid vacation

1 week paid sick

7 paid holidays

Lifetime Fitness membership discount

Job summary

SyMec LLC seeks a Systems Engineer to own the requirements and architecture baseline for software-intensive defense systems. You will write and trace requirements at system, subsystem, and software levels, and model architectures in SysML.

You will be the technical link between customer stakeholders, software developers, and test engineers, ensuring traceability, verification, and clean interfaces across teams in a DoD context.

Qualifications

• Active DoD Top Secret clearance required.
• Bachelor’s degree in Systems, Software, CS, or related STEM field.
• 3–5+ years of systems engineering on DoD or aerospace programs.
• Experience writing, decomposing, and managing software-intensive requirements.
• Hands-on experience with requirements management tools (DOORS, DOORS Next, or Jama).
• Experience developing SysML or UML models in Cameo Systems Modeler, MagicDraw, or Rhapsody.
• Experience developing verification approaches and maintaining traceability and VCRMs.
• Strong technical writing and communication skills.
• U.S. citizenship (required for clearance).

Responsibilities

• Elicit, write, and maintain system, subsystem, and software requirements that are clear, concise, and verifiable.
• Decompose and allocate requirements from customer specifications down to hardware and software components.
• Manage requirements baselines in DOORS/DOORS Next or Jama, with full bidirectional traceability.
• Develop and maintain system and software architecture models in SysML/UML using Cameo Systems Modeler or MagicDraw.
• Model system behavior, interfaces, and data flows using use case, activity, sequence, state machine, and block diagrams.
• Define and document interfaces through Interface Control Documents (ICDs) and interface requirements specifications.
• Define verification methods (test, demonstration, analysis, inspection) and maintain the Verification Cross-Reference Matrix (VCRM).
• Work with test engineers on verification planning; review test procedures and results against requirements.
• Evaluate requirements changes, perform impact analysis, and support the configuration control board (CCB).
• Author and maintain systems engineering artifacts, including SRS, SSDD, CONOPS, and SEMP.
• Prepare and present material at technical reviews (SRR, SFR, PDR, CDR, TRR).
• Work with software teams in Agile environments to connect requirements to features, epics, and user stories.

Skills

Active DoD Top Secret clearance

SysML/UML modeling

Requirements management

Technical writing

Systems engineering

C2C collaboration with software teams

DoD clearance eligibility

Education

Bachelor's degree in Systems, Software, CS, or Electrical Engineering

Tools

DOORS/DOORS Next

Jama

Cameo Systems Modeler

MagicDraw

Rhapsody

Job description

SyMec LLC seeks a Systems Engineer to own the requirements and architecture baseline for software-intensive defense systems. You will write and trace requirements at system, subsystem, and software levels, and model architectures in SysML.

You will be the technical link between customer stakeholders, software developers, and test engineers, ensuring traceability, verification, and clean interfaces across teams in a DoD context.