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Knowesis Inc. · 13 hours ago

Exchange & Virtualization Administrator

Alexandria, VA

Full-time

Hybrid

Senior Level

5+ years exp

Knowesis Inc. is seeking a skilled Exchange & Virtualization Administrator to support the DoD Office of the Inspector General (OIG) in maintaining secure, high-availability messaging and virtual server environments. This role ensures the reliability, performance, and compliance of Microsoft Exchange systems and virtual infrastructure, supporting mission-critical communications and IT services across the enterprise.

AnalyticsInformation TechnologyManagement Consulting

Growth Opportunities

No H1B

Security Clearance Required

U.S. Citizen Only

Responsibilities

Manage and maintain Microsoft Exchange environments (on-premises and/or hybrid Office 365 GCC High)

Monitor mail flow, troubleshoot delivery issues, and ensure secure email operations

Configure mailbox policies, retention settings, and archiving in accordance with DoD OIG standards

Support eDiscovery, litigation holds, and compliance audits

Implement and maintain anti-spam, anti-malware, and email encryption solutions

Administer virtual environments using VMware vSphere, Microsoft Hyper-V, or similar platforms

Provision, monitor, and optimize virtual machines and resource pools

Perform patching, backups, and disaster recovery testing for virtual systems

Collaborate with storage, network, and security teams to ensure performance and compliance

Maintain system documentation and configuration baselines

Ensure systems meet DoD cybersecurity and access control requirements

Support vulnerability remediation and configuration hardening

Maintain audit readiness and assist with inspections and reporting

Implement role-based access controls and enforce least privilege principles

Collaborate with Active Directory, SCCM, and MDM teams to support integrated services

Provide Tier 2/3 support for messaging and virtualization issues

Participate in change management and configuration control processes

Document procedures and contribute to knowledge base development

Qualification

Microsoft Exchange AdministrationVirtual Infrastructure ManagementPowerShell scriptingAzure cloud servicesDoD IT security standardsVMwareHyper-VMicrosoft 365Troubleshooting skillsCertifications e.g.Certifications VCPDocumentation skillsCommunication skills

Required

Bachelor's degree in Information Systems, Computer Science, or a related field

5+ years of experience in Exchange and virtualization administration, including experience with cloud migration projects to include virtual machine migration from on-premises to Azure, and technical expertise in Azure cloud services

Proficiency in Microsoft Exchange Server, Office 365, and virtualization platforms (VMware, Hyper-V)

Strong PowerShell scripting skills for automation and reporting

Familiarity with DoD IT security standards and compliance frameworks

Excellent troubleshooting, documentation, and communication skills