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.