Senior Systems Administrator

Company Overview Hexagon US Federal is a proxy-governed subsidiary of Hexagon AB providing an ever expanding portfolio of Hexagon Technologies to U.S. Federal Government organizations, including defense and intelligence agencies to meet a variety of mission requirements. With our unique capabilities and experience we transform state-of-the-art commercial technology into mission-specific solutions for our customers, partnering with them to solve their most challenging problems.Quick Hits Employees: 200Operating Locations: Chantilly, VA (HQ); Huntsville, AL; Lanham, MD, and other client sites across the US 
We are seeking a Senior Systems Administrator in Lanham, MD.   We are seeking a highly capable Senior Systems Administrator to serve as the primary IT lead for our Lanham, MD office while operating as part of a distributed enterprise IT operations team. This role requires a strong technical foundation across hybrid infrastructure, a high degree of ownership, and the ability to operate independently in a fast-paced, compliance-driven environment.   This role requires a minimum of two days onsite per week, with additional onsite presence as needed to support business operations, projects, or critical incidents. 

A day in the life of a Senior Systems Administrator

• Serve as the primary IT owner for the Lanham office, ensuring reliability, performance, and user support 
• Maintain and support hybrid infrastructure, including VMware ESXi environments, virtual machines, and cloud services
• Administer and optimize Microsoft 365 GCC High (Entra ID, Exchange Online, SharePoint, Teams)
• Support and contribute to data center operations, including system health, maintenance, and incident response
• Act as a key escalation point for complex technical issues across the enterprise
• Partner with a distributed team of system administrators to support enterprise-wide help desk operations
• Drive improvements in system performance, standardization, and operational efficiency
• Support implementation and enforcement of security and compliance controls (CMMC, NIST 800-171, etc.)
• Respond to and lead troubleshooting during outages or critical incidents 

Key Responsibilities:

• Provide hands-on support for onsite needs including workstation deployment, hardware replacement, and troubleshooting 
• Manage and monitor virtual environments across on-prem and cloud platforms
• Participate in ticket triage, escalation, and resolution across a multi-site environment
• Maintain system documentation, procedures, and operational runbooks
• Collaborate with vendors and managed service providers when required
• Support infrastructure-related projects and site-specific initiatives 

This role is for you if you:

• A self-starter who takes ownership and follows through without constant direction
• Comfortable being the go-to IT presence in an office environment
• Able to balance hands-on support with infrastructure-level responsibilities
• Calm under pressure and capable of navigating high-impact incidents
• Collaborative, but equally effective working independently 

What we are expecting from you (i.e. the qualifications you must have):

• 8+ years of experience in systems administration, infrastructure support, or a similar role
• Proven experience managing hybrid IT environments (on-premises and cloud)
• Strong hands-on experience with Microsoft 365, preferably within GCC High or other regulated environments
• Deep experience with VMware ESXi and virtual infrastructure management
• Strong knowledge of Windows Server, Active Directory, Group Policy, and endpoint management
• Experience supporting data center infrastructure and operations 
• Demonstrated ability to troubleshoot and resolve complex, cross-domain technical issues
• Strong communication and customer service skills, with the ability to support both technical and non-technical users
• Ability to work independently, prioritize effectively, and take ownership of systems and issues 

Required Level of Security Clearance:

None

Expected Travel:

5-10%

Work Environment:

• Hybrid role based in Lanham, MD (minimum two days onsite per week)
• Occasional travel to Chantilly, VA and Huntsville, AL may be required
• Expected to support critical incidents outside of standard business hours when necessary 

Physical and Mental Demands:

The physical and mental demands described here are representative of those that must be met by an employee to successfully perform the essential functions of this job. Reasonable acc