Sr. Windows Systems Administrator

Position Title: Senior Windows Systems Administrator

Location: Bronx, NY (Hybrid – 3 days onsite, 2 days remote)

Clearance Requirements: None

Position Status: Contract (12 months)

Rate :$77 on W2 per Hour

We are seeking an experienced Senior Windows Systems Administrator to support and maintain a complex Windows-based enterprise infrastructure. This role is responsible for the administration, security, performance, and availability of Windows Server environments and supporting SQL Server systems. The Senior Administrator will collaborate closely with technical teams, business stakeholders, and application owners to ensure stable and efficient operations across the environment.

The ideal candidate brings 5–7 years of hands-on experience managing Windows Server environments in mid?to?large enterprises, strong troubleshooting skills, and the ability to drive solutions in a fast-paced, hybrid work setting. This is an excellent opportunity for a seasoned systems professional looking to contribute to a high-impact environment.

Windows Systems Administration

• Administer, maintain, and optimize Windows Server 2016/2019/2022 environments

• Manage Active Directory, Group Policy, DNS, DHCP, and Windows patching

• Monitor system performance and resolve hardware, software, and OS-level issues

• Implement and maintain backup, recovery, and disaster recovery processes

• Apply system hardening and security best practices, including vulnerability remediation

SQL Server Support

• Install, configure, and maintain Microsoft SQL Server environments

• Create, maintain, and optimize SQL queries and scripts for automation and reporting

• Perform basic performance tuning, maintenance, and troubleshooting

• Partner with development and application teams for system compatibility and stability

Automation & Virtualization

• Develop and maintain PowerShell scripts to automate routine tasks

• Support and manage virtualization platforms including VMware, Hyper-V, and/or Nutanix

• Assist with system provisioning, capacity planning, and resource optimization

Operations, Collaboration & Documentation

• Collaborate with customers, technical teams, and management to resolve issues

• Follow ITIL-aligned incident, change, and problem management processes

• Produce and maintain system configurations, runbooks, procedures, and change control documentation

• Participate in maintenance windows, troubleshooting efforts, and operational support activities

• 5–7 years of experience as a Windows Systems Administrator in enterprise environments

• Strong hands-on experience with Windows Server, Active Directory, Group Policy, DNS, and DHCP

• Experience installing, maintaining, and scripting for Microsoft SQL Server

• Proficiency in PowerShell scripting and automation

• Strong familiarity with virtualization technologies (VMware, Hyper-V, Nutanix)

• Solid understanding of networking fundamentals (TCP/IP, firewalls, VPNs)

• Strong troubleshooting, analytical, and problem-solving abilities

• Excellent written and verbal communication skills

• Detail-oriented with a commitment to customer service and operational excellence

About Seneca Resources
At Seneca Resources, we are more than just a staffing and consulting firm, we are a trusted career partner. With offices across the U.S. and clients ranging from Fortune 500 companies to government organizations, we provide opportunities that help professionals grow their careers while making an impact.
When you work with Seneca, you’re choosing a company that invests in your success, celebrates your achievements, and connects you to meaningful work with leading organizations nationwide. We take the time to understand your goals and match you with roles that align with your skills and career path. Our consultants and contractors enjoy competitive pay, comprehensive health, dental, and vision coverage, 401(k) retirement plans, and the support of a dedicated team who will advocate for you every step of the way.
Seneca Resources is proud to be an Equal Opportunity Employer, committed to fostering a diverse and inclusive workplace where all qualified individuals are encouraged to apply.