Senior Security Engineer at Leidos

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 customers 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 oversightTackles large security projects both of a technical and compliance nature. The senior engineer is expected to tackle difficult technical issues and changes with minimal oversightSupport 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 sameWork closely with senior engineers other team members and application owners to solve technical problems at the network system and application levelsConduct periodic architectural reviews of installed sensors to assess effectiveness and propose optimal installation alternatives as requiredDocumentation Visio Diagrams and reporting along with presentation teamwork and DHS wide collaboration are among the expected duties and mission of the task orderResolve Linux system errors and crashes disk space problems huge file system and full disk errorsExperience 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 logsHardware and software installations upgrades maintenance security analysis and network performance and tuning of Windows and Linux servers in a virtual infrastructureDefine system security & design requirements to meet FISMA and FedRAMP compliance standardsMaintain a current working knowledge of IT development methodology architecture design security best practices and technical standardsCommunicate with other technical leads IT groups and customer reps so they understand all aspects of proposed changes/solutionsProvide follow-up reports (technical findings feedback resolution steps taken) for Root Cause analysis engineering technical assessment and process improvement initiativesCommunicate security vulnerability reports and trends to ensure appropriate corrective action is takenDevelop implement communicate and enforce security policies and/or processes for data software applications and cloud infrastructureSuperior attention to detail with excellent written and verbal communication problem solving researching and follow-up skillsCommunicates with other technical leads IT groups and clients so they understand the projects technical implications dependencies and potential conflicts. Evaluates the impacts of change requests on own/shared technologies and effectively persuades and influences others on ideasUnderstanding network security (firewalls and IDS) design and implementationBasic Qualifications:BS degree in Science Technology Engineering or related field and 10-12 years of prior relevant experience with a focus on cybersecurity OR Masters with 8-10 years of prior relevant experience.Experience installing configuring securing and troubleshooting Microsoft Windows Server and Red Hat Enterprise Linux or similar Linux distributionsExtensive automation experience with PowerShell and Shell Scripting for automating repeatable tasks and installationsExtensive knowledge of server operations and maintenanceExperience managing Active Directory (AD) and Azure Active DirectoryExperience managing Active Directory Federation Services (AD FS) and single sign-on using SAML and PIV/CACExperience with Active Directory Group Policy managementKnowledge and experience supporting public key infrastructure (PKI)Knowledge and experience implementing and supporting Active Directory Certificate Services (AD CS) and Azure Dedicated HSMKnowledge and experience managing keys certificates certificate requests and format conversions with OpenSSLUnderstanding of cloud terminology architecture and tools to include installing provisioning and monitoringExperience installing configuring and maintaining tools such as Tanium Nessus Axonius CrowdStrike and CyberArk in a hybrid-cloud environmentExtensive knowledge of Ansible and Red Hat SatellitePerform analysis of security posture by reviewing vulnerability and compliance scans and making recommendations for remediations and managing POA&MsExcellent problem solving research and follow-up skillsAbility to obtain an Entry of Duty (EOD) Public TrustCandidate 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 ExpertPreferred 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 resourcesExperience managing Azure Virtual Desktop serviceSolid understanding of developing and leveraging CI/CD pipelines (Continuous Integration/Continuous Deployment)Expertise with Microsoft Azure or AWS Cloud PlatformsExperience automating management tasks with Ansible Puppet or ChefExperience working between different Cloud Provider environments (AWS Azure GCP)Experience developing in Bash Python PowerShellExperience working with SIEM tools such as Splunk to ingest normalize store and maintain data from endpoint network and application source typesIf youre looking for comfort keep scrolling. At Leidos we outthink outbuild and outpace the status quo because the mission demands it. Were not hiring followers. Were recruiting the ones who disrupt provoke and refuse to fail. Step 10 is ancient history. Were already at step 30 and moving faster than anyone else dares.Original Posting:December 11 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.Pay Range:Pay Range $131300.00 - $237350.00The 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.Required Experience:Senior IC Key Skills Car Driving,Access,CFA,Excel,Irrigation,Marine Services Employment Type : Full-Time Experience: years Vacancy: 1 Monthly Salary Salary: 131300 - 237350