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Job #: R-00111516
Location: Arlington, VA
Category: Cyber Security Architecture and Engineering
Schedule (FT/PT): Full Time
Travel Required: No
Shift: Day
Remote Type: Remote
Clearance: None
Referral Eligibility: Eligible
Referral Bonus Amount: $5000
Group: Intelligence

This job posting is no longer active.

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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 that systems are functional, secure, and scalable. The 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:

  • 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:

  • BS degree in Science, Technology, Engineering or related field and 8-10 years of prior relevant experience with a focus on cybersecurity OR Masters with 10 years of prior relevant experience.

  • Experience installing, configuring, securing, and troubleshooting Microsoft Windows Server and Red Hat Enterprise Linux or similar Linux distributions

  • Extensive automation experience with PowerShell and Shell Scripting for automating repeatable tasks and installations

  • Extensive knowledge of server operations and maintenance

  • Experience managing Active Directory (AD) and Azure Active Directory

  • Experience managing Active Directory Federation Services (AD FS) and single sign-on using SAML and PIV/CAC

  • Experience with Active Directory Group Policy management

  • Knowledge and experience supporting public key infrastructure (PKI)

  • Knowledge and experience implementing and supporting Active Directory Certificate Services (AD CS) and Azure Dedicated HSM

  • Knowledge and experience managing keys, certificates, certificate requests, and format conversions with OpenSSL

  • Understanding of cloud terminology, architecture, and tools to include installing, provisioning and monitoring

  • Experience installing, configuring, and maintaining tools such as Tanium, Nessus, Axonius, CrowdStrike, and CyberArk in a hybrid-cloud environment

  • Extensive knowledge of Ansible and Red Hat Satellite

  • Perform analysis of security posture by reviewing vulnerability and compliance scans and making recommendations for remediations and managing POA&Ms

  • Excellent problem solving, research, and follow-up skills

  • Ability to obtain an Entry of Duty (EOD) Public Trust

  • Candidate must, at a minimum, meet one of these certifications: CISSP, CCSP, CCNP, CCIE Security, CEH, RHCSA, RHCA, RHCE, MCSE, COMPTIA Security+, GCIH, GPEN, OSCP, OSCE, Azure Solutions Architect Expert

Preferred Qualifications:

  • Experience managing Palo Alto Networks VM-Series firewalls, AWS Network Firewall, AWS Network ACLs, AWS security groups, Azure Firewall, Azure network security groups, and related network resources

  • Experience managing Azure Virtual Desktop service

  • Solid understanding of developing and leveraging CI/CD pipelines (Continuous Integration/Continuous Deployment)

Pay Range:

Pay Range $97,500.00 - $150,000.00 - $202,500.00

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 a Fortune 500® innovation company rapidly addressing the world’s most vexing challenges in national security and health. The company's global workforce of 47,000 collaborates to create smarter technology solutions for customers in heavily regulated industries. Headquartered in Reston, Virginia, Leidos reported annual revenues of approximately $15.4 billion for the fiscal year ended December 29, 2023.  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 here.

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 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 [email protected].

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 Diversity

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.

This job posting is no longer active.

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