Leidos is seeking a Cybersecurity Engineer to collaborate with the Information System Security Manager (ISSM) managing risks related to the use of processing, storing, or transmitting information to reduce or eliminate impact to confidentiality, integrity, or availability of information and information systems.
Duties will include:
- Ensuring appropriate operational security posture is maintained.
- Conducting scheduled weekly, monthly, quarterly and annual Continuous Monitoring and auditing tasks and reporting.
- Design, configure, implement, troubleshoot, and maintain all security platforms and their associated software, such as firewalls, switches, routers and enterprise devices.
- Install, configure and manage Trellix products.
- Create, tune, and enforce security policies through the ePO console to meet company security standards and compliance requirements.
- Troubleshoot Splunk issues between server and forwarder, create custom dashboards and implement best practices.
- Administer, configure, and maintain the Tenable Security Center.
- Review ACAS results and remediate appropriately.
- Ensuring software, hardware, and firmware comply with appropriate security configuration guidelines (e.g., Security Technical Implementation Guides (STIGs)/Security Requirement Guides (SRGs).
- Developing artifacts and supporting evidence to satisfy all applicable RMF Controls.
- Prepare and maintain security documentation, including System Security Plans (SSPs), Security Assessment Reports, and Plans of Action and Milestones (POA&Ms).
Basic Qualifications:
- Bachelor’s of Science degree in a related field and 2+ years of relevant experience.
- US Citizen with at least an active DoD Secret Clearance and the ability to maintain that clearance during employment.
- Must possess current DOD 8140 certification
Preferred Qualifications:
- Experience with Splunk
- Experience with Trellix
- Experience with ACAS
- Experience with STIG/SRG
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:December 15, 2025For 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.
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.
Top Skills
What We Do
We Are Leidos
For 50 years we have been tackling some of the biggest problems that face our nation and our world.
OUR MISSION
Through our culture of innovation and history of performance, we develop deep customer trust built on integrity and create enduring solutions that improve our world. Leidos is a science and technology solutions leader working to address some of the world’s toughest challenges in the defense, intelligence, homeland security, civil, and healthcare markets. The company’s 43,000 employees support vital missions for government and commercial customers. Headquartered in Reston, Va., Leidos reported annual revenues of approximately $11.09 billion for the fiscal year ended January 3, 2020.
Leidos was cited for the meaningful work employees perform that is challenging, impactful, and aligned with our customers’ missions as reasons professionals want to work and stay at our company. Leidos has also been named to lists including Forbes’ Best Employers for Diversity, Forbes’ America’s Best Employers for Women, Military Times Best for Vets Employers, and Ethisphere Institute’s World's Most Ethical Companies®.
Employees enjoy career enrichment opportunities available through mobility and development and experience rewarding relationships with supportive supervisors and talented colleagues and customers. Employees appreciate our flexible work environment, allowing for and encouraging a true work-life balance. Our professionals are also excited about our Employee Resource Groups, like the newly launched Collaborative Outreach with Remote and Embedded Employees (CORE), which strives to create an environment where every employee, regardless of location, feels fully engaged as a valued employee of Leidos.
Your most important work is ahead.
