Countermeasures Detection Engineer

Leidos' Digital Modernization sector has a current job opportunity for a Defensive Cyber Operations (DCO) Counter-Measures Detection Engineer at Pearl Harbor JBPHH, HI.

This position will support the GSM-O II program, which provides network operations and cyber defense support to the Defense Information Systems Agency (DISA) in support of the DoD and COCOMs. The selected candidate will provide support for defensive cyber operations activities and will be expected to actively engage with a variety of customers and mission partners.

PRIMARY RESPONSIBILITIES:

• Author and deploy novel countermeasures to eliminate threats and illuminate their activities.
• Assess the effectiveness of countermeasures on an ongoing basis and revector actions as needed.
• Design and develop solutions to deliver automated cybersecurity services, conduct agile development & maintenance of automation script/tools to scale cybersecurity work across the enterprise.
• Work with site threat emulation/analytic development team to maximize detection opportunities referenced to the MITRE ATT&CK framework.
• Maintain situational awareness of cyber activity by reviewing DoD, Intelligence Community and open-source reporting for new vulnerabilities, malware or other threats that have the potential to impact the DoDIN.

BASIC QUALIFICATIONS:

• Must have an active DoD Secret clearance and be eligible to obtain TS/SCI
• Bachelor's degree in a related discipline with 8+ years of applicable experience; additional related years of experience is accepted in lieu of a degree.
• DoD-8570 IAT Level 2 baseline certification (Sec+ CE or equivalent) is required to start, and CSSP-A certification must be obtained within 180 days of start date
• Proficiency in programming in at least one modern language (Java, Python, Ruby, C++).
• Custom malware detection development experience.
• Advance understanding of TCP/IP, networking ports and protocols, traffic flow, system administration, OSI model, defense-in-depth and common security elements.
• Understand the life cycle of network threats, attacks, attack vectors, and methods of exploitation with an understanding of intrusion set tactics, techniques and procedures (TTPs).

PREFERRED SKILLS:

• Experience with DISA and DoD Networks.
• Experience countering APTs or emergent threats to DOD networks.
• Skilled in developing extended cyber security analytics.
• Experience in developing and supporting a development environment.
• Experience automating tasks via Bash, Python, PowerShell, or other scripting tools.
• Experience in Linux and Windows-based systems administration in a cloud or virtualized environment.
• Experience with API development and integration.
• Experience with Git, Sigma, Yara, Snort, and Suricata.
• Experience with Detection-as-a-Code.
• Experience with malware analysis concepts and methods.
• Advanced Certifications such as GREM, OSCP, CISSP or CASP.

At Leidos, we don't want someone who "fits the mold"-we want someone who melts it down and builds something better. This is a role for the restless, the over-caffeinated, the ones who ask, "what's next?" before the dust settles on "what's now."

If you're already scheming step 20 while everyone else is still debating step 2... good. You'll fit right in.

Original Posting:
October 30, 2025

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range:
Pay Range $104,650.00 - $189,175.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.