Senior Network and Infrastructure Engineer

We are looking for an experienced Senior Network and Infrastructure Engineer to join our team in Troy, Michigan on a Contract assignment. In this role, you will provide hands-on technical leadership across enterprise infrastructure, network operations, and systems support while helping ensure stable, secure, and well-documented environments. This position works closely with internal technology teams, external partners, and service providers to coordinate implementation efforts, resolve complex issues, and support operational readiness.

Responsibilities:

• Lead and support infrastructure implementation activities, including planning, execution, testing, and post-deployment validation across enterprise environments.

• Administer and troubleshoot core Microsoft services such as Active Directory, Windows Server, Group Policy, domain services, and authentication-related components.

• Coordinate network and infrastructure work with internal teams, vendors, and managed partners to keep project milestones on track and reduce disruption to business operations.

• Verify connectivity across on-premises, cloud-based, hosted, and third-party systems, resolving issues involving routing, firewalls, and secure access paths.

• Assist with application and platform readiness by reviewing dependencies, integrations, certificates, scheduled processes, and supporting server environments.

• Create and maintain technical diagrams, configuration records, runbooks, test results, rollback procedures, and other operational documentation.

• Participate in cutover preparation, deployment rehearsals, go-live activities, and stabilization support following implementation events.

• Identify technical risks, escalate blockers when needed, and contribute to change control, security, and governance practices throughout delivery activities.

• 5+ years of experience in network engineering, infrastructure support, or systems administration roles.

• Strong hands-on expertise with Cisco networking technologies, including Cisco routers, Cisco ASA, and Border Gateway Protocol (BGP).

• Experience supporting enterprise Windows environments, including Active Directory, Group Policy, and Windows Server administration.

• Proven ability to troubleshoot network connectivity, firewall behavior, routing issues, and secure file transfer processes such as FTP.

• Familiarity with infrastructure validation, technical documentation, and production support in complex enterprise environments.

• Ability to work effectively with cross-functional IT teams, third-party vendors, and managed service providers.

• Strong written and verbal communication skills with the ability to document processes and communicate technical issues clearly.

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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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