Senior Windows & Exchange SysAdmin (Classified Infra)

Red River; Lexington (MA); On-site; USD 135,000 - 155,000; Full time

Job summary

Red River in Lexington, MA is seeking a Classified Systems Administrator to join the Enterprise Services Engineering team. You will administer Windows Server, Active Directory, Exchange, and VMware infrastructure, focusing on security, reliability, and continuous improvement of enterprise services in a classified environment.

The role emphasizes Exchange SME development, collaboration with cross-functional teams, and adherence to incident response, patching, and lifecycle management practices

Qualifications

• Bachelor's degree or equivalent professional experience.
• Experience administering Windows enterprise environments.
• Strong hands-on knowledge of Windows 11 and Windows Server.
• Experience with Active Directory and Group Policy.
• Experience administering Exchange Server and related mail flow tasks.
• Willingness to develop into the team's Exchange SME and manage Exchange environments.
• Strong VMware knowledge including vCenter/ESXi/vSAN and networking.
• Understanding of enterprise networking concepts and troubleshooting.
• Experience with PowerShell or similar scripting for automation.
• Experience troubleshooting complex infrastructure issues.
• Knowledge of patching, vulnerability remediation, and system hardening.
• Ability to work independently and with a technical team.
• Demonstrated ability to learn new technologies.
• Excellent troubleshooting, communication, and documentation skills.
• Active Secret-level U.S. Government security clearance
• CompTIA Security+ certification or ability to obtain within six months

Responsibilities

• Administer Windows-based enterprise services and virtualization infrastructure.
• Maintain, secure, and improve Windows Server and Active Directory environments.
• Support Microsoft Exchange Server and become SME for Exchange environments.
• Develop operational best practices, document the environment, and assist teammates.
• Collaborate with system administrators, network engineers, cybersecurity personnel, and end users.
• Manage lifecycle, patching, monitoring, and troubleshooting across enterprise infrastructure.
• Troubleshoot complex issues independently and with cross-functional teams.
• Support classified computing environments under supervision.

Skills

Windows Server

Windows 11

Active Directory

Group Policy

Microsoft Exchange Server

VMware virtualization (vCenter/ESXi/vS

Networking (TCP/IP, DNS, DHCP)

PowerShell

Troubleshooting

Security best practices

Documentation

Independent and collaborative work

Education

Bachelor's degree in Computer Science / IT / Information Systems / Cybersecurity or equivalent

Equivalent professional experience

Tools

VMware vSphere

vCenter Server

ESXi

vSAN

SCCM / MECM

PowerShell scripting

Job description

Red River in Lexington, MA is seeking a Classified Systems Administrator to join the Enterprise Services Engineering team. You will administer Windows Server, Active Directory, Exchange, and VMware infrastructure, focusing on security, reliability, and continuous improvement of enterprise services in a classified environment.

The role emphasizes Exchange SME development, collaboration with cross-functional teams, and adherence to incident response, patching, and lifecycle management practices