Systems Engineer III

Reflexive Concepts; Maryland; On-site; USD 150,000 - 190,000; Full time

Job summary

Reflexive Concepts seeks a Systems Engineer III to join our team in Maryland, blending Linux CLI expertise with Jira Service Desk administration to support requirements engineering, integration planning, and lifecycle management on complex, mission-focused systems. Active TS/SCI + FS Polygraph is required and experience with compliance needs is essential.

The role emphasizes cross-stakeholder alignment, disciplined configuration and change control, and the creation of clear, comprehensive

Qualifications

• Active TS/SCI + FS Polygraph is required.
• 10+ year systems engineering experience preferred; 20 years stated.
• Clear documentation and governance experience across complex programs.
• Experience with Linux CLI and Jira Service Desk administration.
• Industry-standard security and compliance knowledge.

Responsibilities

• Lead requirements engineering for mission-focused systems.
• Develop integration strategies and coordinate cross-team dependencies.
• Oversee lifecycle management, risk identification, and mitigation.
• Maintain configuration baselines and enforce change control.
• Produce diagrams, procedures, and reports for engineering and operations.

Skills

Linux CLI

Requirements elicitation

System integration planning

Risk mitigation

Configuration management

Stakeholder communication

System lifecycle strategies

Technical documentation

Jira Service Desk administration

Git

Education

Bachelor's degree in Systems Engineering or related field

Five years of substitution for a bachelor's degree

Active TS/SCI + FS Polygraph

Security+ certification preferred

Tools

Jira Service Desk

Git

Job description

Reflexive Concepts is seeking a skilled Systems Engineer III to join our team!

The Systems Engineer supports requirements engineering, integration planning, lifecycle management, and technical risk and issue mitigation across complex, mission-focused systems on the IaaS task. The role pairs strong Linux command-line expertise with deep Jira Service Desk administration, and carries responsibility for driving cross-stakeholder alignment, maintaining disciplined configuration and change control, and producing clear, comprehensive technical documentation that supports engineering, operations, and compliance needs.

Qualifications:

• Active TS/SCI + FS Polygraph
• Twenty (20) years' experience as a Systems Engineer, in programs and contracts of similar scope, type, and complexity
• Demonstrated experience in planning and leading Systems Engineering efforts
• Bachelor's degree in Systems Engineering, Computer Science, Information Systems, Engineering Science, Engineering Management, or a related discipline from an accredited college or university
• Five (5) years of additional Systems Engineering experience may be substituted for a bachelor's degree
• Security+ certification preferred

Required Skills + Experience:

• Demonstrated proficiency navigating Linux systems using the Linux CLI
• Experience eliciting, analyzing, validating, and documenting technical and functional requirements to ensure solutions meet stakeholder needs and align with mission objectives
• Experience developing detailed integration strategies, coordinating cross team dependencies, and overseeing system integration activities to ensure seamless interoperability across components
• Experience at identifying potential risks, evaluating impacts, creating mitigation plans, and tracking issues through resolution to maintain system stability
• Proficient in maintaining disciplined configuration baselines, documenting changes, enforcing version control processes, and ensuring all modifications follow established governance procedures
• Strong ability to collaborate with diverse technical and non-technical stakeholders, facilitating clear communication, alignment, and timely decision-making throughout the project lifecycle
• Experienced in defining system lifecycle strategies, including development, deployment, maintenance, enhancement, and decommissioning phases to support long term program sustainability
• Produces clear, comprehensive, and well-structured technical documentation, including diagrams, procedures, how-to guides, and reports that support engineering, operations, and compliance needs
• Hands-on expertise designing, configuring, and maintaining Jira Service Desk projects, workflows, automation, permissions, and custom fields to optimize service delivery and operational efficiency
• Excellent written and verbal communication skills with strong attention to detail

Desired Skills + Experience

• Experience with Git Source Control System