Senior Security Engineer

Description

Leidos has an immediate need for a Senior Security Engineer for a new customer on a highly-visible and strategic Cybersecurity Task Order. The Senior Security Engineer will need to be a self-starter with excellent analytical and problem-solving skills, flexibility, good judgment and the ability to coordinate multiple, concurrent tasks in an effective manner. This individual will work with internal team members to ensure the systems are functional, secure, and scalable. The systems and networks developed will be used to collect and process data and improve the customer's security infrastructure. The Senior Security Engineer will support the design and development of cybersecurity tools and technology along with integration of new architectural features into existing infrastructures while maintaining the integrity and security of enterprise-wide systems and networks.

Primary Responsibilities :

• Provides technical leadership and support to a team of Senior / Junior Security Engineers with a broad scope of capabilities and tools, including Splunk, Tanium, Cyberark, SOAR, security stacks, networking protocols, Threat Intelligence Platforms, Cloud technology, and other security operations-related technologies.
• Manage multiple assignments, changing priorities, and work independently with little oversight
• Tackles large security projects, both of a technical and compliance nature. The senior engineer is expected to tackle difficult technical issues and changes with minimal oversight
• Support all support, guidance and develop processes to evaluate and improve all operating systems, hardware support, software, firmware solutions and provide advisement concerning future purchase of the same
• Work closely with senior engineers, other team members and application owners to solve technical problems at the network, system and application levels
• Conduct periodic architectural reviews of installed sensors to assess effectiveness and propose optimal installation alternatives as required
• Documentation, Visio Diagrams and reporting along with presentation, teamwork and DHS wide collaboration are among the expected duties and mission of the task order
• Resolve Linux system errors and crashes, disk space problems, huge file system and full disk errors
• Experience in backend solution, day to day system admin and monitoring, file system management and disk management and creation of shell scripts for the automation of tasks and the extraction of logs
• Hardware and software installations, upgrades, maintenance, security analysis and network performance and tuning of Windows and Linux servers in a virtual infrastructure
• Define system security & design requirements to meet FISMA and FedRAMP compliance standards
• Maintain a current working knowledge of IT development methodology, architecture design, security best practices, and technical standards
• Communicate with other technical leads, IT groups, and customer reps so they understand all aspects of proposed changes / solutions
• Provide follow-up reports (technical findings, feedback, resolution steps taken) for Root Cause analysis, engineering technical assessment and process improvement initiatives
• Communicate security vulnerability reports and trends to ensure appropriate corrective action is taken
• Develop, implement, communicate, and enforce security policies and / or processes for data, software applications, and cloud infrastructure
• Superior attention to detail with excellent written and verbal communication, problem solving, researching and follow-up skills
• Communicates with other technical leads, IT groups, and clients so they understand the project's technical implications, dependencies, and potential conflicts. Evaluates the impacts of change requests on own / shared technologies and effectively persuades and influences others on ideas
• Understanding network security (firewalls and IDS) design and implementation

Basic Qualifications :

Preferred Qualifications :

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 11, 2025

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 $131,300.00 - $237,350.00

The Leidos pay range for this job level is a general guideline onlyand 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 www.Leidos.com .

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 www.leidos.com / careers / pay-benefits .

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 LeidosCareersFraud@leidos.com .

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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