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Network Security Expert

1 month ago

Laurel, United States Leidos Full time

Description

Leidos is seeking an experienced Network Security Expert to provide Tier 3 sustainment support for a mission critical IP voice transport network. The position requires extensive experience in designing, implementing, and maintaining complex networks with a focus on security, high availability, and performance. The ideal candidate will work closely with operations, management, and customer stakeholders to ensure the network is secure and functioning optimally.

Primary Responsibilities:

  • Design, implement, test, and maintain a complex enterprise network using industry best practices.
  • Resolve escalated network and security support issues.
  • Independently conduct network assessments, identify vulnerabilities, and recommend solutions.
  • Lead the development of network documentation, diagrams, and standard operating procedures.
  • Support Continuous Service Improvements (CSI) and participate in Root Cause Analysis for Problem Management activities.
  • Work with cross-functional teams to plan and execute network upgrades, migrations, and deployments.
  • Manage vendor relationships and ensure timely delivery of program deliverables.
  • Monitor, capacity plan, and ensure backup and recovery of network equipment.
  • Evaluate and recommend new technologies, tactics, and tools to improve service delivery.
  • Mentor and coach junior engineers, including training and support as required.

Core Qualifications:

  • Bachelor's degree with 8-12 years of relevant experience or Masters with 6-10 years of relevant experience.
  • Active DoD clearance at the Top-Secret level with SCI eligibility.
  • Security+ Certification or other DOD 8570 IAT Lvl II Certification.
  • Extensive knowledge of defense-in-depth principles, Network and Security architecture, network topology, IT device integrity, and common security elements.
  • 10+ years' experience engineering and troubleshooting networks.
  • Strong understanding and in-depth knowledge of IP network/subnet addressing.
  • Ability to travel up to 10%, including OCONUS potential travel.

Preferred Qualifications:

  • Experience with Juniper route, switch and security appliances (MX, EX, SRX).
  • Experience with Session Initiation Protocol (SIP) implementation and design concepts.
  • Experience with SolarWinds configuration and maintenance.
  • Experience with change, configuration, and performance management NetOps concepts.
  • IAT Level III Certification (i.e. CISSP or equivalent).