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Featured Employers

Senior Network Engineer Zscaler SME

Company: General Dynamics IT
Location: Rockville, MD
Employment Type: Full Time
Date Posted: 10/16/2026
Job Categories: Engineering, Information Technology

Job Description

Senior Network Engineer Zscaler SME
GDIT is seeking a Senior Network Engineer with deep Zscaler expertise to support the Health Resources & Services Administration (HRSA). You will own the design, operation, and security of HRSA's Zscaler environment while supporting the broader enterprise LAN/WAN, firewall, and remote-access infrastructure. This is a hands-on engineering role working directly with Project Managers, the Office of Information Security and Privacy (OISP), and desktop/server support teams.How you will make an impactAdminister, upgrade, and optimize Zscaler Internet Access (ZIA), Private Access (ZPA), and Digital Experience (ZDX), including major/minor releases, reporting, and security blocks.Create and maintain ZIA security policies (SSL inspection, URL filtering, DLP, CASB, app control, advanced threat protection) in partnership with OISP.Maintain SSO integration between Zscaler and HRSA's Identity Provider (Okta), including SAML attributes and SCIM provisioning.Conduct Zscaler Best Practices Assessments and Security Lifecycle Reviews; recommend and implement ruleset changes as security and networking requirements evolve.Develop troubleshooting playbooks for Zscaler Client Connector issues and support endpoint and server teams.Design, implement, and maintain enterprise LAN/WAN, routing/switching, firewalls, and remote access (IPv4/IPv6).Support RSA SecurID / Authentication Manager and its integration with VPN, RADIUS, and LDAP.Monitor network performance, lead upgrades and technology refreshes, and coordinate hardware/software procurement as needed.Deliver ad-hoc Zscaler reports for leadership and maintain network documentation, diagrams, and SOPs.What you need to succeedBachelor's degree or equivalent combination of education and experience.8+ years of network engineering experience, including 5+ years hands-on administering Zscaler (ZIA, ZPA, ZDX).Strong SASE architecture knowledge and proven Zscaler policy expertise: SSL inspection, URL filtering, DLP, CASB, threat protection.Experience integrating Okta or another IdP with Zscaler via SAML/SCIM.Strong networking fundamentals (TCP/IP, DNS, routing/switching, IPsec VPN, firewalls) and end-to-end connectivity troubleshooting, including PCAP analysis with Wireshark.Hands-on experience with Cisco switching/IOS upgrades and at least one enterprise firewall platform (Cisco ASA/Firepower or Palo Alto/Panorama).Experience in federal or enterprise environments with strict compliance and 99.9%+ uptime requirements; familiarity with NIST 800-53, TIC 3.0, and CISA BODs.Formal change-management experience and TLS certificate lifecycle management.Excellent communication, documentation, and collaboration skills. Preferred qualificationsZscaler Certified Cloud Professional (ZCCP) or Zscaler Certified Cloud Administrator (ZCCA).Okta Certified Professional or higher.Cisco ISE, RSA SecurID, SolarWinds scripting, Azure networking (NSGs), Riverbed, Grafana, or Cribl.Location: Rockville, MD onsite 5 days/week Clearance: Ability to obtain a Public Trust. Must have resided in the U.S. for 3 of the last 5 years and pass a public trust background investigation.GDIT is your place: 401(k) with company match, comprehensive health and wellness packages, paid education and certifications, internal mobility support, and cutting-edge technology to learn from.#GDITFedHealthJobs