Threat Intelligence & Situational Awareness
Maintain continuous awareness of the cyber threat landscape by analyzing DoD, Intelligence Community, and open-source intelligence reporting
Identify new vulnerabilities, malware families, and threat actor TTPs that could impact mission-critical networks
Translate threat intelligence into actionable defensive measures and detection capabilities
Collaborate with DISA, mission partners, and Combatant Commands to enhance collective defense postur
What You Bring
Required Qualifications
Active DoD Top-Secret Clearance
Bachelor's degree in Computer Science, Cybersecurity, Computer Engineering, or related field with 8+ years of hands-on experience (or equivalent combination of education and experience)
DoD 8570 IAT Level II certification (Security+ CE or equivalent) , CSSP-A certification required within 180 days
Strong programming proficiency in at least one modern language: Python, Java, Ruby, or C++
Proven experience developing custom malware detection capabilities
Advanced understanding of
TCP/IP, network protocols, ports, and traffic flow analysis
System administration across multiple platforms
OSI model and defense-in-depth security architecture
Common security elements and enterprise security technologies
Deep knowledge of threat actor lifecycle, attack vectors, exploitation methods, and intrusion set Tactics, Techniques, and Procedures (TTPs)
UNIX/Linux administrative skills
Highly Desired Experience
Direct experience with DISA and DoD network environments
Proven track record countering APTs and nation-state threats targeting DoD networks
Advanced cybersecurity analytics development and implementation
DevSecOps experience developing and supporting secure development environments
Automation expertise using Bash, Python, PowerShell, or other scripting languages
Linux and Windows system administration in cloud or virtualized environments (AWS, Azure, VMware)
API development and integration experience
Proficiency with security tools: Git, Sigma, Yara, Snort, Suricata
Hands-on malware analysis using reverse engineering techniques
Advanced certifications: GREM, OSCP, GCFA, CISSP, CASP, or GIAC
Why This Role Matters
As a Countermeasures Engineer, you'll be a force multiplier for national defense. Your innovative solutions will protect critical DoD infrastructure, support warfighter operations, and defend against nation-state cyber campaigns. You'll work alongside elite cyber professionals, engage directly with Intelligence Community partners, and see the immediate impact of your work on national security.
If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.
Original Posting
September 29, 2026
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 $87,100.00 - $157,450.00
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.
