Network Administrator

Description
We are looking for an experienced Network Administrator to support and enhance client infrastructure in Manchester, New Hampshire. This contract position with the potential to become permanent is ideal for a hands-on, detail-oriented individual who excels in network security, systems administration, and client-facing technical collaboration. The role focuses on maintaining reliable connectivity, securing business environments, and delivering practical infrastructure improvements across multi-site organizations.

Responsibilities

Oversee the administration, tuning, and ongoing support of firewall environments using leading platforms such as Fortinet, SonicWall, Cisco Meraki, Palo Alto, and WatchGuard. Build, maintain, and optimize network infrastructure, including switching, VLAN segmentation, routing, and wireless connectivity for client environments. Configure secure site-to-site and remote access VPN solutions to ensure dependable connectivity for distributed users and locations.

Track network health and security posture, respond to performance concerns, and address risks before they affect business operations. Conduct firewall policy assessments, manage rule sets, and participate in security reviews to strengthen protection and compliance. Contribute to infrastructure planning for new deployments, expansions, and technology refresh initiatives across client sites. Diagnose and resolve advanced network and connectivity problems spanning multiple offices and mixed environments.

Administer Windows Server platforms and core services such as Active Directory, Group Policy, file services, and print services. Support Microsoft 365 and Azure AD environments, including collaboration, device management, and cloud-based user administration. Partner with clients and internal sales stakeholders during discovery discussions, assessments, solution planning, and technical presentations. Requirements
At least 5 years of hands-on IT experience, including 2 to 3 years working within a managed services environment.

Demonstrated background supporting firewalls and network infrastructure across multiple client organizations. Strong knowledge of switching, VLANs, routing, VPN technologies, and wireless networking concepts. Experience with one or more enterprise firewall platforms such as Fortinet FortiGate, SonicWall, Cisco Meraki, Palo Alto, or WatchGuard. Hands-on administration experience with Windows Server environments, including Active Directory and Group Policy. Familiarity with Microsoft 365 and Azure AD administration in business settings.

Working knowledge of PSA or RMM tools such as ConnectWise, Autotask, Kaseya, N-central, or NinjaRMM. Reliable transportation and the ability to travel for on-site client support when needed. Technology Doesn't Change the World, People Do. Robert Half is the world's first and largest specialized talent solutions firm that connects highly qualified job seekers to opportunities at great companies. We offer contract, temporary and permanent placement solutions for finance and accounting, technology, marketing and creative, legal, and administrative and customer support roles.

Robert Half works to put you in the best position to succeed. We provide access to top jobs, competitive compensation and benefits, and free online training. Stay on top of every opportunity - whenever you choose - even on the go. Download the Robert Half app and get 1-tap apply, notifications of AI-matched jobs, and much more. All applicants applying for U.S. job openings must be legally authorized to work in the United States. Benefits are available to contract/temporary professionals, including medical, vision, dental, and life and disability insurance.

Hired contract/temporary professionals are also eligible to enroll in our company 401(k) plan. Visit roberthalf.gobenefits.net for more information.
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