Cyber Security Engineer

Leidos Security Enterprise Solutions (SES) is seeking a highly skilled Cybersecurity Engineer to work onsite at our Security Enterprise Solutions (SES) facility in Tewksbury, MA. This role offers the chance to make a significant impact on aviation security while advancing your career.

We’re looking for someone with:

• Self-starting individual with the right attitude, aptitude to identify, take ownership of and solve challenging problems
• Interest in continual learning and development of the team and themselves.
• Ability to work collaboratively and independently to develop creative solutions
• Passion for securing and maintaining IT and OT systems critical to national and international security

Primary Responsibilities:

• Integrate security requirements into IT systems.
• Conduct vulnerability assessments
• Maintain and troubleshoot secure Windows and Linux baselines
• Implement system hardening and compliance
• Implement and integrate static and dynamic code analysis tools
• Research and evaluate Cybersecurity tools and methodologies
• Collaborate with cyber and product architects to harden platforms and tool chains
• Define and enforce secure-by-default software engineering practices
• Document and automate best practices

Required Qualifications:

• Bachelor’s degree in Computer Science, Cybersecurity, Engineering, or a related field. Additional experience, certifications or training may be considered in lieu of degree.
• 1-3+ years of relevant IT/ DevOps/Security Engineering experience.
• Active DoD Approved 8570/8140 Baseline Certification or ability to obtain within 6 months (e.g. CompTIA Security+, Network+, CySA+, Microsoft Azure Fundamentals, etc).
• Beginner to intermediate Windows, Linux and Networking skills
• Experience in hardening modern operating systems and implementing security engineering best practices.

Preferred Qualifications:

• Programming/Scripting: Python, Bash, PowerShell, C++, C#, Java (minimum)
• Networking: Strong understanding of network architecture - Experience with core infrastructure services administration such as AD, DNS, DHCP, and File Server administration
• Experience with Vulnerability Management (e.g., Tenable Security Center / Nessus)
• Experience with DISA STIGs and/or CIS Benchmarks; deploying secure images with Ansible, SteelCloud, and/or Microsoft Deployment Toolkit (MDT)
• Experience with NIST Cybersecurity Framework, ISO 27001, NIST 800-171 (CMMC), or Risk Management Framework (RMF).

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 17, 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 $57,850.00 - $104,575.00

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.