Principal​/Senior Principal Systems Engineer Security Clearance

Position: Principal / Senior Principal Systems Engineer with Security Clearance
Principal / Senior Principal Systems Engineer (Integration, Test & MBSE)
Mid–Senior Level | $98,400 – $184,200 | Orlando, FL | Secret Clearance Required
Design, integrate, and verify complex defense systems where disciplined systems engineering, automation, and model-based design ensure mission success in high-consequence environments.
A Day in the Life – What You’ll Do
Serve as a key member of the systems engineering and integration & test (I&T) team supporting secure, mission-critical systems
Collaborate with customers, systems engineering leads, architects, software, gateware, infrastructure, and test teams
Develop concepts of operations (CONOPS), system concept definitions, and interface specifications
Decompose, allocate, and manage system-level requirements across hardware and software components
Apply Model-Based Systems Engineering (MBSE) practices to define, analyze, and document system behavior
Develop and maintain SysML models (use cases, sequence diagrams, activity diagrams) to support system design and traceability
Design, implement, and maintain automated test solutions to verify requirements and system functionality
Develop formal test plans, test procedures, and test reports
Support hardware-software integration, deployment, configuration, validation, and troubleshooting on custom platforms
Analyze complex system behaviors, identify defects, and document issues using structured change-control processes
Operate effectively in Agile development environments while maintaining accuracy, traceability, and technical rigor
Communicate technical content clearly to customers, stakeholders, and senior leadership

Education & Experience Requirements
Principal Level
Bachelor’s degree in STEM with 5+ years of relevant experience
OR Master’s degree in STEM with 3+ years of relevant experience
OR PhD in STEM with 1+ year of relevant experience
Senior Principal Level
Bachelor’s degree in STEM with 8+ years of relevant experience
OR Master’s degree in STEM with 6+ years of relevant experience
OR PhD in STEM with 4+ years of relevant experience

Required Qualifications
Citizenship & Clearance
U.S. Citizenship required
Active DoD Secret clearance required
Systems Engineering & Technical Skills
Experience developing concepts of operations and interface definitions
Experience decomposing, allocating, and translating requirements into hardware and software specifications
Strong understanding of systems engineering principles and lifecycle processes

Experience with requirements analysis, development, traceability, and management
Proficiency with requirements management tools (Rational DOORS or equivalent)
Experience implementing and using Model-Based Systems Engineering (MBSE) tools and practices
Proficiency in SysML, including use cases, sequence diagrams, and activity diagrams
Experience developing models in Cameo Enterprise Architecture or equivalent MBSE tools
Experience testing software applications and verifying system requirements
Experience developing formal test plans, procedures, and reports
Knowledge of Agile principles, tools, and implementation
Strong written and verbal communication skills
Proven ability to collaborate across cross-functional engineering teams

Preferred Qualifications
Experience developing automated tests (Eggplant or similar tools)
Experience scripting in Python to automate manual processes

Experience with version control and code repositories (Git, Git Lab, etc.)
Proficiency working in Linux environments (RHEL preferred)
Proven experience in hardware-software integration on custom platforms
Experience across the full systems engineering lifecycle, including:
Requirements decomposition
Test planning
Verification and validation
Integration and system sell-off
Large-scale or complex system development experience across multiple program phases
Understanding of software development methodologies
Experience preparing verification documentation for system-level requirements
Strong customer-facing communication and presentation experience
Ability to manage multiple priorities and concurrent projects
Salary Range
Principal Level: $98,400 – $147,600
Senior Principal Level: $122,800 – $184,200
Final compensation is based on…