Senior Systems Engineer – Security Integration

Four Sea Group; Aurora (CO); On-site; USD 151,695 - 205,233; Full time

Benefits offered by this job

Employee Stock Ownership Plan

Comprehensive health and dental benefits

Generous PTO and flexible time-off options

Job summary

Four Sea Group in Aurora, Colorado, is seeking a Senior Systems Engineer specializing in Security Integration. This role involves supporting secure programs through the implementation and integration of security-focused systems. Candidates should possess a strong systems engineering background and active TS/SCI clearance with Full Scope Polygraph.

The ideal candidate will have extensive experience in privileged-user implementations and system security posture maintenance. Our employee-owned company offers competitive compensation, comprehensive benefits, and opportunities for growth.

Qualifications

• 6+ years of relevant experience in secure environments.
• Active TS/SCI clearance with Full Scope Polygraph.
• Hands-on experience with security-related hardware.

Responsibilities

• Support deployment and integration of security-focused system capabilities.
• Troubleshoot integration issues in secure environments.
• Document technical configurations and deployment changes.

Skills

Privileged-user implementation

Security system integration

Troubleshooting

Strong communication skills

Education

Bachelor's degree in Systems Engineering or related field

Tools

Firewalls

Audit logging controls

Job description

Senior Systems Engineer – Security Integration

About Four Sea Group, Inc.

Four Sea Group is a 100% employee-owned technical mission support company based in Denver, Colorado. Founded by an aerospace industry veteran and PhD astrophysicist, we support complex defense, space, software, systems, and mission-focused programs for government and industry partners. What sets FSG apart is the caliber of our people and the way we operate: we are a reputation-driven team of highly skilled engineers and technical experts who are brought in for their depth, judgment, and ability to solve difficult problems. As an employee-owned company, we have built our compensation, benefits, and culture around a simple idea: when the company succeeds, that value should go back to the people doing the work.

About the role

We are seeking a Senior Systems Engineer – Security Integration to support a secure program through implementation, integration, deployment, and sustainment of security-focused system capabilities. This role is best suited for a strong systems engineer with an IA background who can work independently within a defined scope, support mission-critical deployments, and help maintain system security posture across a secure customer environment.

The ideal candidate brings hands‑on experience with privileged‑user implementation, security-focused system integration, and deployment of infrastructure or hardware‑related security solutions, along with the ability to coordinate effectively across engineering and program teams.

What you'll do

• Support implementation, integration, deployment, and sustainment of security-focused system capabilities within a secure program environment.
• Configure and support systems, devices, and infrastructure components related to information assurance and mission security needs.
• Assist with deployment and integration of hardware- and security-related technologies across program environments.
• Support system security posture through disciplined implementation of approved configurations, controls, and technical solutions.
• Work with engineering, cyber, operations, and program stakeholders to support successful execution and deployment activities.
• Troubleshoot and resolve system, integration, and implementation issues affecting security-focused environments.
• Support use and implementation of privileged‑user functions in accordance with program and customer requirements.
• Participate in technical reviews, deployment planning, and readiness activities prior to implementation.
• Document technical configurations, deployment changes, issues, and system impacts clearly and accurately.
• Escalate risks, blockers, and technical concerns appropriately and in a timely manner.

Required Qualifications

• Bachelor’s degree in Systems Engineering, Electrical Engineering, Computer Engineering, Information Systems, Cybersecurity, or another relevant technical field, or equivalent practical experience.
• 6+ years of relevant systems, integration, security engineering, or information assurance experience in secure technical environments.
• Active TS/SCI clearance with Full Scope Polygraph required at time of application.
• Experience supporting information assurance or security-focused system implementation in classified or mission-driven environments.
• Experience with privileged-user implementation, system integration, and deployment activities.
• Experience with security-related hardware or infrastructure components in operational environments.
• Experience with technologies such as firewalls, guards, audit or logging-related controls, filtering technologies, or similar security infrastructure.
• Experience troubleshooting and resolving integration or deployment issues in secure environments.
• Ability to work independently within assigned scope and coordinate effectively across engineering and program stakeholders.
• Strong written and verbal communication skills.

Preferred Qualifications

• Experience with cross-domain technologies, secure data transfer controls, filtering/scrubbing technologies, or guard-related implementations.
• Experience with hardware security integration, device-level deployment, or secure infrastructure rollout activities.
• Experience supporting classified deployments and operational transition of secure technologies.
• Experience with audit logging, system monitoring, or security event visibility within mission environments.
• Experience supporting system hardening, configuration control, or implementation of security baselines.
• Experience working closely with cyber, systems, infrastructure, and operations teams in secure customer environments.
• Experience in defense, intelligence, or other highly secure mission-critical programs.

Salary

The salary range for this role is $151,695.00- $205,233.00 per year. The salary range provided is a good-faith estimate representative of all experience levels. Four Sea Group, Inc. considers several factors when extending an offer, including but not limited to, the role, function and associated responsibilities, a candidate’s work experience, location, education/training, key skills, and market conditions.

Application Deadline

This position is expected to remain open through July 31, 2026. The company may adjust this deadline based on business needs and will update the posting as appropriate.

Benefits

FSG is 100% ESOP-owned, which means our employees share directly in the company’s growth. We offer competitive compensation, a strong employer-funded retirement plan, generous PTO and flexible time‑off options, comprehensive health, dental, vision, life, short-term disability, and long-term disability benefits, plus a generous medical stipend that gives employees more choice and flexibility. Our model is intentionally built to keep more value with employees through salary, retirement, benefits, and ownership. You will work alongside experienced engineers and technical leaders on meaningful defense, space, software, systems, and mission support work, with room to grow as a technical expert, mentor, program contributor, or future leader.

EEO Statement

Four Sea Group is an equal opportunity employer and considers qualified applicants for employment without regard to race, color, sex, sexual orientation, gender identity or expression, religion, national origin, marital or familial status, age, disability, veteran status, militaryserviceor application for military service.