Cyber Security Engineer

Job description

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.

About Leidos

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit

Pay and Benefits

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at

Securing Your Data

Beware of fake employment opportunities using Leidos’ name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system - never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at

If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission.

Commitment to Non-Discrimination

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.

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Who can apply

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