Sr. Network Security Engineer (OMT)

Company: Leidos
Location: Sierra Vista
Posted on: July 14, 2025

Job Description:

Job Description Description Leidos is seeking an Sr. Operation and Management Network Security Engineer to join our AGUN team. PROGRAM SUMMARY: The AGUN program is a highly demanding mission and requires expert technical and professional management to support the Army’s global wide area network and security infrastructure. You will be supporting a large and complex network migration and operations for the US Army. This role will include resolving service tickets on the AGUN system, providing prioritized validated/tested automated workflows to the Operations and Management Team, and providing operational support activities for a global network. CLEARANCE REQUIREMENT: Must currently possess and be able to maintain an active DoD SECRET security clearance. (US Citizenship required) PRIMARY RESPONSIBILITIES: - Operate and maintain secure network solutions operated as a centralized enterprise capability for the US Army. - Support 24x7x365 AGUN operations focused on providing the Global Cyber Center (GCC) updates to facilitate command and control of the AGUN network. - Conduct standard policy and configuration changes to the AGUN network, common remediation or those workflows considered pre-approved and normal. - Provide management, triage, track, update workflows and service tickets in both JIRA Service Desk and GCC Service Now. - Provide situational awareness on status of ticket resolution, provide status updates and brief updates as directed by the GCC. - Escalate tickets and problems through the Jira Service Desk ticketing system to higher tier teams as required. - Partner with key stakeholders and technical experts to perform legacy environment discovery, assessing current capabilities, configurations, and requirements to provide tier III support for the Army global network. - Collect, investigate, and identify network optimization strategies and techniques to meet capacity and performance standards. BASIC QUALIFICATIONS: - Minimum of a Bachelor’s degree with 8 years' experience or Master's degree with 6 years of experience (additional years of directly applicable experience may be accepted in lieu of a degree). - Require active DoD IAT Level II (i.e. Security) certification or equivalent prior to start. - Demonstrated experience with supporting Palo Alto NGFW. - Knowledge of Software Defined Networking (SDN) concepts. - Demonstrated experience with virtualization technologies such as VMware. - Experience with Red Hat. - Hands on experience with InfoVista. - Must have experience in working with two or more of the following vender network technologies: Cisco, Juniper, Palo Alto, Dell, or AppGate. - Demonstrated experience using ServiceNow. - Demonstrated experience with networking concepts and protocols: LAN, WAN, BGP, TCP/UDP, IPSec, VPN, Routing(L2/L3), and Firewalls. - Demonstrate experience in one or more of the following enterprise network management tools such as Palo Alto Panorama, Cisco Prime, Cisco DNA, or Junos Space. - Experience with the following protocols: SFTP, SSH, SCP, SNMP, NTP. - Must be able to work as part of a team to lead troubleshooting and resolve complex network issues. - Excellent written and verbal communication skills. PREFERRED QUALIFICATIONS: - Certified Cisco Network Professional (CCNP) or equivalent. - Demonstrated experience in Linux shell scripting. - Experience with GitLab source control and CI/CD pipeline development. - Experience using JIRA and Confluence. - Experience managing trouble tickets and escalations. - Experience with NetSecOps technologies including salt, git, Ansible, Terraform, Puppet and network element managers. - Network Performance Management (SNMP, NETMON, LiveAction) - Demonstrated experience in any two or more of the following: Netflow, Elastic, Kafka, Grafana, Prometheus, or Nexus Repo. - Demonstrate expertise in design and improvement of complex and geographically diverse enterprise networks. - Expert knowledge of US Army security requirements for network infrastructure. Original Posting:June 6, 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 $89,700.00 - $162,150.00 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.

Keywords: Leidos, Catalina Foothills , Sr. Network Security Engineer (OMT), IT / Software / Systems , Sierra Vista, Arizona