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Senior Network Infrastructure Engineer

Job in Portland, Multnomah County, Oregon, 97204, USA
Listing for: Lexicon Solutions
Full Time, Part Time, Contract position
Listed on 2025-12-22
Job specializations:
  • IT/Tech
    Systems Engineer, Cybersecurity, Network Engineer, Network Security
Salary/Wage Range or Industry Benchmark: 90000 - 120000 USD Yearly USD 90000.00 120000.00 YEAR
Job Description & How to Apply Below
Position: 4680 – Senior Network Infrastructure Engineer

Senior Network Infrastructure Engineer (2 Openings)

Location:

inner SE Portland, OR (Hybrid – ~3 days/week on-site)

Type: 2-year contracts (potential for extension)

We’re supporting our client as they add two Senior Network Infrastructure Engineers to their Network & Server team. These roles focus on high‑availability, converged network infrastructure in a complex enterprise environment where reliability and safety really matter.

We’re recruiting for two senior‑level roles:
Sr. Network Engineer – Firewall / Security Focus
  • Lead design, deployment, and support of next‑gen firewalls (Palo Alto preferred) in a highly segmented environment.
  • Help build out new network modules to isolate services (e.g., separating CCTV from rail environments) and reduce blast radius.
  • Serve as a primary/secondary SME for firewall policy, rule sets, and security best practices (PCI/HIPAA exposure is a plus).
Sr. Network Engineer – Wireless / Mobility (Cisco / Meraki) Focus
  • Own design and support of Cisco wireless controllers and Meraki environments across yards, facilities, and vehicles.
  • Support existing operations where vehicles use Wi‑Fi and cellular to offload CCTV footage, and help drive the long‑term move toward real‑time cellular connectivity across the fleet.
  • Work on projects involving mobile/vehicle RF, MPLS networking, and future cellular‑first architectures.

If you’re stronger on one side (firewalls or wireless/Meraki) but have strong route/switch fundamentals and are comfortable learning, our client is open to candidates who can grow into the tools.

In both roles, you’ll:

  • Plan, design, implement, and manage
    our client’s IT communication and network infrastructure, with an emphasis on high availability and security.
  • Support and improve a complex, converged environment:
    Cisco switches/routers, wireless, firewalls, VPN/remote access, and monitoring/platform tools.
  • Troubleshoot network and server issues in a mission‑critical 24/7 environment
    , quickly resolving outages and degraded service in coordination with internal teams and vendors.
  • Integrate with Microsoft‑centric platforms:
    Active Directory, M365 hybrid
    , virtualization, backup, and real‑time monitoring systems.
  • Participate in, and sometimes lead,
    complex projects from design through implementation and cutover.
  • Help drive IT process maturity
    , documentation, and cross‑team collaboration as they continue to modernize their infrastructure and practices.
  • Some off‑hours / on‑call participation is expected to support critical systems.
Core background (senior‑level):
  • ~4+ years
    of hands‑on experience in
    network management and network security
    in a complex enterprise setting.
  • Strong experience designing, implementing, and supporting multi‑site network environments.
  • Proven background supporting mission‑critical systems (public sector, utilities, transportation, healthcare, financial services, etc. all translate well).
Technical strengths we’re targeting (mix across both roles):
  • Strong routing/switching
    (Cisco) and converged network design.
  • Firewall / Security role:
  • Next‑gen firewalls (ideally
    Palo Alto
    , but Fortinet/Check Point/etc. are also relevant).
  • Network segmentation, policy design, and rule‑set hygiene.
  • Wireless / Mobility role:
  • Cisco wireless controllers
    and
    Meraki
    wireless management.
  • Experience with large‑scale Wi‑Fi deployments and/or vehicle/yard environments is a plus.
  • Exposure to MPLS
    , mobile/vehicle RF networking, CCTV, and voice/telephony is helpful.
  • Experience with cloud/hybrid
    (Azure and/or AWS) is a nice‑to‑have.
  • Relevant certifications (CCNA/CCNP, Network+, Security+, Microsoft, etc.) are appreciated but not required.
Soft Skills & Culture Fit

Our client is very focused on collaboration and communication as they raise IT maturity across the organization. They’re looking for someone who:

  • Communicates clearly with both technical and non‑technical stakeholders.
  • Can translate technical tradeoffs into business language
    and help shape requirements.
  • Works well across teams instead of in silos.
  • Is curious, adaptable, and willing to learn new tools (e.g., Palo Alto, Meraki) as long as the core fundamentals are solid.
  • Cares about public service, safety, and reliability for the community.
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Position Requirements
10+ Years work experience
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