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Job Details


Senior Security Engineer ( R-00055014 )

Law Enforcement and Security

Diplomatic Security



Washington, Washington DC, United States


Job Description:

Leidos is seeking a talented Senior Security Engineer to join our team and lead our Infrastructure and Sensors team in support of a federal customer within the Department of Homeland Security (DHS) Enterprise Security Operations Center (ESOC). Senior Security Engineer will lead a team gather requirements and design, codify, integrate and implement secure solutions that support Security Operations as well as the underlying infrastructure required to deploy and run those solutions.

Primary Responsibilities

  • Lead the Infrastructure and Sensors engineering team
  • Provide leadership, coaching, and mentorship to team members
  • Conceptualize, Design, Build, and Maintain current and future SOC tools and platforms.
  • Manage multiple assignments, changing priorities, and work independently with little 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.
  • Conduct network security architecture reviews to determine the size, and placement of intrusion monitoring equipment during the customer onboarding process.
  • Conduct periodic reviews of sensor metric reports to evaluate and prioritize sensors for review and assessment.
  • Produce System Design documents, weekly and monthly reporting, and preparation and presentation of recommendations to the customer.
  • Resolve Linux system errors and crashes, disk space problems, huge file system and full disk errors.
  • Implementation and troubleshooting of Linux network services such as NFS, NTP, FTP, SSH, DNS, Sendmail,
  • Configure LDAP server and LDAP client on Linux machines for authentication and authorization.
  • Build new Linux Virtual Machines and physical servers using templates and ISOs.
  • Create new Linux templates and apply STIGs using DISA guidelines.
  • System administration 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 Linux servers in a virtual infrastructure.
  • Installation, maintenance, and operation of Red Hat Satellite Server to manage RHEL server infrastructure.
  • Support operations across multiple geographic locations.
  • Develop solutions to complex technical issues.
  • Provide follow-up reports (technical findings, feedback, resolution steps taken) for Root Cause analysis, engineering technical assessment and process improvement initiatives

Basic Qualifications

  • The candidate shall have bachelor’s degree in Computer Science, Engineering, or related field and a minimum of 12 years of experience in system administration, database administration, network engineering, software engineering, or software development, with a concentration in cybersecurity
  • At least one of the following certifications: CASP, GCIH, GCWN, GISF, GISP, GSSP, GICSP, GSSP, SEI, CISSP, CSSLP, SSCP, CCNP, CCNP Security, CCIE Security, CEH, ECSP, MCSE, RHCA, RHCE, VCP, VCAP, VCIX, VCDX, Splunk Enterprise Certified Architect
  • Experience installing, configuring, securing, and troubleshooting, RHEL, CentOS or Ubuntu Linux
  • Extensive automation experience with PowerShell and Shell Scripting for automating Linux installs
  • Experience mentoring junior personnel
  • Extensive knowledge of DELL (Power Edge) and other Enterprise Servers
  • Experience deploying and supporting IDPS
  • Experience deploying and supporting Full Packet Capture systems
  • Network experience and understanding with the following: TCP/IP, NIS, NFS, DNS, DHCP, FTP/TFTP, SSH, SFTP, ARP.
  • Experience with storage tools such as NAS (NFS, SAMBA, RAID 0/1/5/6/10) and SAN (iSCSI, FiberChannel)
  • Experience supporting Hyper Converged Infrastructure (HCI)
  • Cloud and VMWare skills – Understanding of cloud terminology, architecture, and tools to include: installing, provisioning and monitoring

Preferred Qualifications

  • Extensive knowledge of Ansible, Satellite, and VMWare ESXi/VCenter
  • Experience working in AWS and Azure
  • Experience with Suricata and Gigamon
  • Experience developing in Bash, Python, YAML, PowerShell scripts
  • Experience working in an Agile development environment.

External Referral Bonus:Eligible

Potential for Telework:No

Clearance Level Required:None


Scheduled Weekly Hours:40


Requisition Category:Professional

Job Family:Security Architecture and Engineering

Pay Range: