IT Infrastructure

1 week ago

Ridgefield Park, New Jersey, United States Nexien Inc. Full time

Job Summary:

We are seeking an experienced IT Infrastructure & Network Engineer to join our Managed Service Provider (MSP) team. This role focuses on the design, implementation, and support of Cisco-based network infrastructures, Microsoft systems, and security solutions including firewall, NAC, and PMS platforms. The ideal candidate will have hands-on experience managing enterprise-level infrastructure environments, with strong technical depth across both network operations and security management. You will play a key role in maintaining client environments, optimizing performance, and ensuring compliance with security best practices.

Responsibilities:

  • Design, configure, and manage Cisco network infrastructures (routing, switching, WAN/LAN, VPN).
  • Deploy, operate, and support Cisco and Fortinet firewalls, including rule management, VPN setup, and security monitoring.
  • Implement, manage, and support Network Access Control (NAC) systems for client environments.
  • Administer and maintain Patch Management Systems (PMS) for operating systems and applications.
  • Provide advanced troubleshooting and escalation support for network and infrastructure incidents.
  • Manage Windows Server environments (Active Directory, DNS, DHCP, GPO) and perform system maintenance.
  • Support Microsoft 365, Exchange Online, and Azure AD administration and migration projects.
  • Oversee virtualization environments (VMware, Hyper-V) including performance tuning and backup operations.
  • Conduct security audits, patch management, and compliance assessments.
  • Develop and maintain network and system documentation, topology diagrams, and configuration records.
  • Collaborate with senior engineers and security teams on infrastructure hardening and security policy enforcement.
  • Provide technical support and consulting to clients on infrastructure and network security improvements.

Qualifications:

  • Professional experience in IT infrastructure and network engineering, preferably in an MSP or multi-client environment.
  • Strong analytical and diagnostic skills across complex, multi-client environments.
  • Excellent communication and customer service abilities.
  • Proactive in identifying and resolving performance and security issues.
  • Capable of working independently and mentoring junior engineers.
  • Strong documentation and process-oriented mindset.

Technical Skills:

  • Advanced Cisco configuration (BGP, OSPF, VLANs, ACLs, VPNs).
  • Firewall deployment and management (Cisco ASA, Firepower, FortiGate).
  • NAC (Network Access Control) solution deployment and operation.
  • PMS (Patch Management System) operation, automation, and reporting.
  • Microsoft infrastructure administration (Windows Server, Active Directory, Azure AD).
  • Virtualization (VMware, Hyper-V) and backup management (Veeam, Datto).
  • Network monitoring tools (SolarWinds, N-central, PRTG, etc.).
  • Scripting and automation experience (PowerShell, Python preferred).

Certifications:

  • Cisco CCNP (Required)
  • Sonicwall / Fortinet or equivalent firewall certification (Preferred)
  • Microsoft Certified: Azure Administrator Associate or M365 Administrator (Preferred)
  • CompTIA Security+ or similar (a plus)

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