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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Defensive Cyber Operations (DCO) Counter-Measures Engineer - **Company:** Science Applications International Corporation - **Location:** Whitehall, NY, United States (Remote available) - **Experience:** Expert - **Salary:** $107,900.0 - $195,050.0 - **Contract:** Permanent contract - **Skills:** Java (Programming Language), Microsoft Windows, Application Programming Interfaces (APIs), Agile Methodology, Bash Shell, Unix, C++ (Programming Language), Cloud Computing, CompTIA Security+, Cyber Security, Information Systems, Computer Programming, Linux, Global System for Mobile Communications, Integrated Development Environments, Internet Security, OSI Models, Information Systems Security Architecture Professional, Python (Programming Language), Network Security, Microsoft Security Essentials, Network Administration, Network Protocols, Open Source Technology, Open Systems Interconnection (OSI), Windows PowerShell, Comptia Pentest+ CE, Ruby, TCP/IP, Transmission Control Protocol (TCP), Virtualization Technology, Web Analytics, Snort (Software), Scripting, Computer Network Operations, Malware, Git, Tactics, Techniques and Procedures (TTPs), Malware Detection, Api Design, Cyber Warfare, Vulnerability Analysis - **Published:** August 9, 2026 - **Apply:** https://www.careerbuilder.com/job-details/dco-counter-measures-engineer-whitehall-oh--e6c1c4b4-d73f-45a5-85b7-7eb8c50c1802 ## About the Role * 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. * Requires 8140 Cyber Defense Infrastructure Support Specialist 521 (CS) Intermediate-level compliance, to include one of the following certifications: Security+, PenTest+, CySA+, GSEC, or GMON. * 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). * UNIX Administrative skills. 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 Principles. * Experience with malware analysis concepts and methods. * Advanced Certifications such as GREM, OSCP, CISSP or CASP., Administrative Skills, Agile Programming Methodologies, Application Programming Interface (API), Automation, Bash Scripting, C++ Programming Language, CISSP - Certified Information Systems Security Professional, Cloud Computing, CompTIA Security+, Computer Security, Defense Information Systems Agency (DISA), Defense in Depth, DoD Secret Clearance, GSEC - GIAC Security Essentials Certification, GSM (Global System for Mobile Communications), Git, Intelligence Community, Internet Security, Java, Legal, Linux Operating System, Malware, Malware Analysis, Microsoft Windows System Administration, Network Administration/Management, Network Protocols, Network Security, Open Source, Open Systems Interconnection (OSI), Python Programming/Scripting Language, Risk Management, Ruby, Scripting (Scripting Languages), Security Analysis, Sensitive Compartmented Information (SCI), Service Delivery, Snort, Systems Administration/Management, TCP/IP (Transmission Control Protocol/Internet Protocol), Top Secret Clearance, United States Department of Defense (DoD), Unix Operating Systems, Virtualization, Web Analytics, Web Infrastructure, Windows PowerShell, Writing Skills ## Description Leidos' Digital Modernization sector has a current job opportunity for a Defensive Cyber Operations (DCO) Counter-Measures Engineer. 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. This position can be based out of any of our three core sites - Scott AFB, IL; Hill AFB, UT; or Columbus, OH. Partial/hybrid telework may be allowed, but a consistent on-site presence is required., * 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. * Develop custom integrations, data correlation, and processing strategies to reduce cybersecurity risk and act as a Subject Matter Expert for the automation team. * 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. ## Related Videos - [Security Pitfalls for Software Engineers](https://www.wearedevelopers.com/videos/726-security-pitfalls-for-software-engineers) - [WeAreDevelopers LIVE - Node and Package Security](https://www.wearedevelopers.com/videos/2138-wearedevelopers-live-node-and-package-security) - [Coffee with Developers: David Heinemeier Hansson](https://www.wearedevelopers.com/videos/875-coffee-with-developers-david-heinemeier-hansson) - [How a Small Team Shrank a Microsoft Monorepo by 94%](https://www.wearedevelopers.com/videos/1236-how-a-small-team-shrank-a-microsoft-monorepo-by-94) - [Coffee with Developers - Robby Russell](https://www.wearedevelopers.com/videos/917-coffee-with-developers-robby-russell) - [Cyber Sleuth: Finding Hidden Connections in Cyber Data](https://www.wearedevelopers.com/videos/893-cyber-sleuth-finding-hidden-connections-in-cyber-data) ## Related Articles - [9 Ways to Make Money Hacking](https://www.wearedevelopers.com/magazine/333-9-ways-to-make-money-hacking) - [Dev Digest 134 - Where pixels sing?](https://www.wearedevelopers.com/magazine/477-dev-digest-134-where-pixels-sing) - [Understanding and Mitigating Common Web Vulnerabilities](https://www.wearedevelopers.com/magazine/565-understanding-and-mitigating-common-web-vulnerabilities) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [Dev Digest 216: CyberSec + Mythos, Stack Overflow for Agents & DOOM in TTF](https://www.wearedevelopers.com/magazine/728-dev-digest-216-cybersec-mythos-stack-overflow-for-agents-doom-in-ttf) - [Walking Into The Era of Supply Chain Risks](https://www.wearedevelopers.com/magazine/106-walking-into-the-era-of-supply-chain-risks)