Network Administrator

COMMON - A Users Group; Newton (MA); On-site; USD 110,000 - 150,000; Full time

Job summary

COMMON - A Users Group is seeking a Network Administrator to design, implement, and manage enterprise network infrastructure across data centers, cloud environments, and customer sites.

The role requires strong Cisco and Fortinet skills, experience with SD-WAN, VPN, and network security, and the ability to lead projects from planning to operation.

Qualifications

• Bachelor’s degree in information technology, computer science, engineering or related field.
• 5+ years of enterprise network administration and engineering experience.
• Hands-on Cisco Routing & Switching experience.
• Experience with Cisco ACI, DNA Center, SDA and ISE.
• Fortinet firewalls & SD-WAN experience.
• VPN technologies and secure remote connectivity.

Responsibilities

• Design, deploy, and maintain enterprise network infrastructure across data centers and cloud environments.
• Manage LAN, WAN, VPN, SD-WAN, and wireless networks; monitor performance and availability.
• Configure Fortinet firewalls, NAT, VPNs, and UTM capabilities; conduct security audits.
• Lead network projects from planning through implementation and transition to operations.
• Maintain network diagrams, SOPs, and operational documentation.

Skills

Cisco Networking

Network Security

SD-WAN

VPN

LAN/WAN

Education

Bachelor's degree in IT/CS/Engineering

Tools

Cisco ACI

Cisco DNA Center

Cisco ISE

Cisco Nexus Dashboard

Fortinet Firewall

Job description

The Network Administrator is responsible for the design, implementation, administration, maintenance, and optimization of enterprise network infrastructure across data centers, cloud-connected environments, and customer sites. This role provides technical leadership for network projects, security solutions, data center technologies, SD-WAN, wireless infrastructure, and next-generation networking platforms.

The ideal candidate possesses strong expertise in Cisco and Fortinet technologies, network security, infrastructure migrations, and enterprise networking best practices, with a proven ability to ensure the high availability, performance, and security of critical business systems

Key Responsibilities

Network Infrastructure Management

• Design, deploy, and maintain enterprise network infrastructure, including routers, switches, wireless networks, and data center environments.
• Manage and support LAN, WAN, VPN, SD-WAN, and wireless network solutions.
• Monitor network performance, capacity, and availability while implementing improvements as needed.
• Perform hardware lifecycle management, including EOL/EOS device replacement and upgrades.

Network Security & Fortinet Administration

• Configure, deploy, and maintain FortiGate firewalls, security policies, NAT, VPNs, and Unified Threat Management (UTM) capabilities.
• Implement and manage IPSec and SSL VPN solutions for secure remote connectivity.
• Conduct firewall rule reviews, security audits, and optimization activities.
• Support network access control and identity management integrations.

Cisco Data Center & Enterprise Networking

• Implement and support Cisco ACI environments, including Single Pod, Multi-Pod, and Multi-Site architectures.
• Manage and support Cisco Nexus Dashboard and Multi-Site Orchestrator (MSO) deployments.
• Perform firmware upgrades, hardware replacements, and fabric enhancements.
• Support Cisco DNA Center (DNAC), Cisco SDA, Cisco ISE, and wireless infrastructure deployments.

Project Delivery & Implementation

• Lead network projects from planning through implementation and transition to operations.
• Develop High-Level Designs (HLDs), Low-Level Designs (LLDs), implementation plans, and technical documentation.
• Conduct technical assessments and recommend infrastructure improvements.
• Coordinate migrations, upgrades, and transformation initiatives across customer environments.

Operations & Support

• Troubleshoot complex network issues and provide escalation support for critical incidents.
• Collaborate with internal and external stakeholders to ensure timely issue resolution and service continuity.
• Ensure compliance with organizational change management processes.
• Maintain network diagrams, SOPs, and operational documentation.

Required Qualifications

• Bachelor’s degree in information technology, Computer Science, Engineering, or a related field.
• 5+ years of progressive experience in enterprise network administration, implementation, and engineering.
• Strong hands-on experience with:
• Cisco Routing & Switching
• Cisco ACI
• Cisco SDA / DNA Center
• Cisco ISE
• Cisco Wireless (WLC & Access Points)
• Fortinet Firewalls & SD-WAN
• VPN TechnologiesNetwork Security Solutions
• Experience managing network infrastructure projects and migrations.