Sr. Windows Server/VMWare Administrator

Seneca Resources Company, LLC; Suffolk (VA); On-site; USD 90,000 - 130,000; Full time

Benefits offered by this job

Competitive pay

Comprehensive health, dental, and vision coverage

401(k) retirement plans

Job summary

A staffing and consulting firm is seeking a Senior Windows Server / VMware Administrator to maintain and secure enterprise server infrastructure in a DoD-regulated environment. Responsibilities include managing Windows Server and VMware environments, ensuring system availability, and supporting security compliance. Ideal candidates have experience in classified environments, strong knowledge of Windows Server and VMware systems, and possess an active security clearance. Competitive compensation and comprehensive benefits are offered.

Qualifications

• Proven experience administering Windows Server environments.
• Hands-on experience with VMware vSphere/vCenter.
• Active Secret or Top Secret clearance required.
• Experience supporting systems in DoD or classified environments.
• Active Secret or Top Secret clearance and IAT Level II certification (Security+, CySA+, CCNA Security, GSEC, GICSP, SSCP).

Responsibilities

• Administer and maintain Windows Server environments.
• Manage Active Directory, Group Policy, and core Windows services.
• Support VMware vSphere infrastructure.
• Oversee VM lifecycle, performance tuning, and availability.
• Apply DoD STIGs for Windows and VMware systems.
• Perform vulnerability scanning and remediation (ACAS / Nessus).
• Manage server patching using WSUS or enterprise tools.
• Develop and maintain PowerShell automation for admin tasks.
• Monitor performance and troubleshoot infrastructure issues.
• Collaborate with cybersecurity and network teams for secure operations.

Skills

Windows Server administration

VMware vSphere

PowerShell scripting

DoD cybersecurity compliance

IAT Level II certification

Education

Bachelor's degree in a technical field or 5+ years of experience

Tools

Active Directory

DNS

Windows Server 2016/2019/2022

VMware vCenter

ACAS / Nessus

Job description

Overview

Position Title: Sr. Windows Server / VMware Administrator
Location: Suffolk, VA
Clearance Requirements: Active Secret or Top Secret Clearance
Position Status: Contract-to-Hire (C2H)
Pay Rate: Competitive; commensurate with experience

Position Description

We are seeking a highly skilled Senior Windows Server / VMware Administrator to support, secure, and optimize enterprise server infrastructure in a DoD-regulated environment. This role is ideal for a hands-on infrastructure professional who thrives in mission-critical environments and brings deep experience with Windows Server, VMware virtualization, and DoD security compliance.

The selected candidate will play a key role in ensuring system availability, performance, and cybersecurity compliance while collaborating closely with cybersecurity and network teams.

Responsibilities

• Administer and maintain Windows Server 2016/2019/2022 environments
• Manage Active Directory, Group Policy (GPO), DNS, and core Windows services
• Support VMware vSphere infrastructure, including vCenter Server and ESXi hosts
• Oversee virtual machine lifecycle management, performance tuning, and availability
• Apply and maintain DoD STIGs for Windows and VMware systems
• Perform vulnerability scanning and remediation using ACAS / Nessus
• Manage server patching and updates using WSUS or enterprise patching tools
• Develop and maintain PowerShell automation for administrative and security tasks
• Monitor system performance and troubleshoot infrastructure issues
• Collaborate with cybersecurity and network teams to ensure secure, compliant operations

Required Skills / Education

• Bachelor’s degree in a technical field OR 5+ years of equivalent professional experience
• Proven experience administering Windows Server environments
• Hands-on experience with VMware vSphere / vCenter
• Experience supporting systems in DoD or classified environments
• Active Secret or Top Secret clearance
• IAT Level II certification, one of the following:
• Security+
• CySA+
• CCNA Security
• GSEC
• GICSP
• SSCP

Preferred Qualifications

• Advanced certifications such as VMware Certified Professional (VCP), MCSE: Core Infrastructure, or CISSP
• Strong proficiency in PowerShell scripting and automation
• In-depth knowledge of DoD cybersecurity policies, RMF, and STIG implementation
• Experience with enterprise backup and storage solutions

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. Our consultants and contractors enjoy competitive pay, comprehensive health, dental, and vision coverage, 401(k) retirement plans, and the support of a dedicated team that advocates 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.