Sr. Network Administrator

Description

We are looking for an experienced Sr. Network Administrator to lead the design, delivery, and ongoing support of a resilient enterprise network environment. This position plays a key role in maintaining secure, high-performing connectivity across sites while strengthening infrastructure reliability and operational readiness. The ideal candidate brings deep expertise in enterprise routing, switching, firewall administration, and load balancing, along with the ability to resolve complex network challenges and partner effectively with technical teams.

Responsibilities:

Architect, deploy, and administer enterprise network infrastructure to support availability, performance, and future growth across multiple locations.

Configure and maintain core networking platforms, including routers, switches, wireless solutions, firewalls, and load balancing technologies.

Track network health through proactive monitoring, analyze trends, and take corrective action to prevent service disruption.

Investigate and resolve advanced connectivity, latency, and security issues using structured troubleshooting methods.

Work with infrastructure, cloud, and application teams to deliver network support for projects, upgrades, and operational initiatives.

Apply and enforce network security standards, including firewall policy management, segmentation, and access controls.

Contribute to disaster recovery and business continuity planning by validating network resilience and recovery procedures.

Maintain clear technical documentation covering network topology, configurations, standards, and support processes.

Evaluate and support enterprise technologies such as Cisco Nexus, Fortinet FortiGate, F5 load balancers, cloud networking in Azure, and emerging platforms under consideration.

Assist with network automation efforts and operational efficiency improvements using tools such as Ansible when applicable.

Requirements

Proven experience administering enterprise networks with strong hands-on knowledge of Cisco routing and switching environments.
Expertise with Cisco Nexus platforms and broad understanding of wireless networking technologies.
Practical experience managing Fortinet FortiGate firewalls and implementing secure network policies.
Knowledge of F5 load balancing solutions, including advanced application delivery and security features.
Solid understanding of dynamic routing protocols and best practices for scalable network design.
Experience supporting cloud networking components within Microsoft Azure environments; exposure to additional cloud platforms is beneficial.
Strong analytical and problem-solving skills with the ability to diagnose and resolve complex network issues.
Excellent communication and documentation skills, with the ability to collaborate effectively across technical teams.

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.

2025 Robert Half. An Equal Opportunity Employer. M/F/Disability/Veterans. By clicking "Apply Now," you're agreeing to Robert Half's Terms of Use and Privacy Notice.