Senior Network Administrator

We are seeking a highly experienced Senior Network Administrator with expertise in enterprise networking, firewalls, and network access control solutions. The ideal candidate brings a strong background in architecting and supporting complex campus and datacenter networks, with deep hands-on experience in Aruba, Cisco, and firewall technologies. This role is critical to the design, implementation, and ongoing support of secure and scalable network infrastructures.

Key Responsibilities:

• Design, configure, and maintain complex campus and datacenter networks, ensuring high availability and optimal performance.
• Install, configure, and support Aruba ClearPass and/or Cisco ISE for network access control and authentication.
• Architect and manage enterprise firewall solutions (e.g., Cisco Firepower, Palo Alto, Check Point) in multi-site environments.
• Implement and support Cisco FirePower for intrusion prevention, advanced malware protection, and firewall services.
• Troubleshoot network performance issues, conduct root cause analysis, and perform upgrades and patching as needed.
• Develop and maintain network documentation including topology diagrams, change control, and operational procedures.
• Ensure network infrastructure complies with security policies, industry standards, and audit requirements.
• Collaborate with cybersecurity, server, and application teams to support integrated IT solutions.

Qualifications:

• 8+ years of hands-on experience configuring and supporting enterprise-level networks.
• 4+ years in a senior or lead role managing firewall architectures and advanced network security.
• Experience with Cisco routing and switching, Aruba wireless and ClearPass, and network segmentation best practices.
• Proven experience with Cisco Firepower installation, design, and ongoing support.
• Strong understanding of TCP/IP, BGP, OSPF, EIGRP, VLANs, VPNs, and NAC technologies.
• Experience with LAN/WAN architecture, remote access technologies, and high-availability networking.
• Scripting or automation experience using Python, Ansible, or similar tools is a plus.

Certifications (Required or Preferred):

• CCNP, JNCIP, or equivalent professional-level networking certification required.
• Certifications such as Aruba Certified Mobility Professional (ACMP) or Cisco Security certifications are a strong plus.

Nice to Have:

• Experience with cloud networking (AWS, Azure, or GCP).
• Familiarity with network monitoring tools like SolarWinds, Nagios, or PRTG.
• Knowledge of zero trust network architecture and segmentation strategies.
• Exposure to software-defined networking (SDN) and network virtualization (e.g., VMware NSX)