Senior Windows Systems & Active Directory Administrator

Job Title: Senior Windows Systems & Active Directory Administrator
Location: Columbus, OH
Work Model: Hybrid (Remote Monday & Friday; Onsite Tuesday–Thursday)
Rate: $60–$65/hour
Contract Length: 3‑Month Contract‑to‑Hire
Conversion Salary: $135,000 base + 10% bonus
Employment Type: W‑2 Only
Work Authorization: U.S. Citizens Only | No visa sponsorship available

We are seeking a highly skilled Senior Windows Systems & Active Directory Administrator to support and lead enterprise infrastructure operations within a large, complex environment. This is a hands‑on technical leadership role responsible for administering, securing, optimizing, and modernizing Windows Server and Active Directory environments while also providing leadership across a team of 10+ professionals.

The ideal candidate will bring deep expertise in Windows Server administration, Active Directory architecture, Group Policy, DNS, DHCP, PKI, patching, vulnerability remediation, and identity‑related technologies across large enterprise environments. This individual will serve as a technical lead for infrastructure initiatives, including upgrades, migrations, remediation efforts, and security‑driven improvements, while helping ensure operational stability, compliance, and performance across critical systems.

This role is approved for conversion after 90 days and is best suited for a strong technical leader who is comfortable rolling up their sleeves, driving complex infrastructure work, and supporting a highly secure, compliance‑driven organization.

• Administer, secure, and maintain enterprise‑level Windows Server and Active Directory infrastructure.
• Manage core Active Directory services, including Domain Controllers, Group Policy, DNS, DHCP, PKI, replication, authentication services, and directory components
  .
• Design, implement, and maintain Group Policy Objects to support security, configuration management, and operational consistency.
• Monitor and optimize the performance, availability, and reliability of Windows Server and Active Directory environments.
• Troubleshoot complex system, authentication, replication, and directory‑related issues across enterprise infrastructure.

• Support cloud‑connected identity technologies including Azure AD / Microsoft Entra ,
  Microsoft 365
  , and federation/authentication tools such as PingID
  .
• Help maintain and support hybrid identity architecture and authentication services across on‑premises and cloud‑connected environments.
• Ensure identity‑related systems are aligned with security standards, access controls, and operational requirements.

• Lead enterprise patch deployment cycles and vulnerability remediation efforts across Windows infrastructure.
• Use tools such as Tanium and Qualys to manage patching, scanning, compliance, and remediation activity.
• Monitor, prioritize, and resolve vulnerabilities in accordance with enterprise security and compliance expectations.
• Partner with security and infrastructure stakeholders to drive risk reduction and strengthen platform resilience.

• Serve as technical lead for critical infrastructure projects, including migrations, upgrades, consolidation efforts, and security remediation initiatives
  .
• Lead or support infrastructure modernization efforts involving virtualization environments, cloud‑connected systems, and identity platforms
  .
• Provide guidance and technical direction across a team of 10+ professionals.
• Support planning, coordination, and execution of infrastructure improvements in a structured and operationally sound manner.
• Drive best practices for Windows platform management, system hardening, automation, and operational support.

• Develop and maintain automation scripts using Power Shell for patch deployment, vulnerability remediation, system configuration, and operational support.
• Improve efficiency through scripting and automation of repetitive administrative and maintenance tasks.
• Troubleshoot and optimize performance across server…