Red Team Security Engineer III

Millennium Corporation•Virginia Beach, VA

About The Position

Millennium is proud to be part of the Markon Solutions family of companies a network of specialized organizations united in support of critical national security missions. This partnership strengthens our ability to deliver results by expanding our technical depth, operational reach, and access to a broader bench of proven experts, ensuring our customers continue to receive best-in-class cybersecurity support.For more than two decades, Millennium has operated at the forefront of cybersecurity. Our elite team of over 300 professionals brings an unmatched record of performance across Red Team Operations, Defensive Cyber Operations, Software Engineering, and Technical Engineering. As home to the largest contingent of contracted Red Team operators supporting the Department of Defense, Millennium delivers unparalleled threat intelligence and battle-tested expertise to both DoD and federal civilian customers. What We Believe Millennium is an equal opportunity employer and does not discriminate or allow discrimination on the basis of race, color, religion, gender, age, national origin, citizenship, disability, veteran status or any other classification protected by federal, state, or local law. Responsibilities Millennium is hiring a Senior Red Team Security Engineer- CSE III in Virginia Beach, VA. Candidate must have an active Top Secret/SCI clearance.

Requirements

An active Top Secret security clearance.
Bachelor’s degree from an accredited college or university in computer science, information systems, engineering, scientific, or a mathematics-intensive discipline
A minimum of 8 years of experience in Offensive Cyber Operations or NSA-certified DoD Red Teaming
OSCP, ROPS RT1, or CRTO certification
Demonstrated experience leading or serving as senior operator on classified red team missions

Nice To Haves

Prior NAVSEA, US Navy, or weapon system cyber assessment experience
NSA Red Team Operator (RTO) qualification
Advanced certifications (OSEP, OSEE, GXPN, CRTO, etc.)
Experience with Long-dwell and stealth-focused operations; EDR/AV evasion; ICS/OT or platform-centric cyber assessments
Strong briefing and technical writing skills for senior government audiences

Responsibilities

Lead technical execution of advanced offensive cyber operations in support of Red Team missions.
Advise government leadership on attack paths, mission risk, and outcomes.
Serve as technical lead, mentor, and trusted advisor within NSA-certified DoD Red Team operations.
Lead and execute complex, multi-phase red team engagements
Design adversary emulation campaigns aligned to real-world threat actors
Develop and maintain custom tooling, payloads, and C2 infrastructure
Execute advanced evasion, persistence, and long-dwell operations
Mentor entry- and mid-level operators
Support ROE development, mission planning, and executive out-briefs
Ensure compliance with NSA and DoD red team standards
Assist with Business Development activities as required to support Millennium's strategic business objectives, which may include but not limited to participation in technical interviews, creation of technical documentation, general proposal writing support and proposal color reviews.