Senior System Administrator

Perfecta • Reston, VA, US • 1w ago

Perfecta is looking for an on-site System Administrator to maintain, upgrade and manage our software, hardware and networks. Resourcefulness is a necessary skill in this role. You should be able to diagnose and resolve problems quickly. Your goal will be to ensure that our information technology infrastructure runs smoothly and efficiently with little or no unplanned downtime.

Responsibilities

· Monitoring system performance and troubleshooting issues

· Ensure security and efficiency of IT infrastructure

· Install and configure software and hardware

· Manage network servers and technology tools

· Set up and issue computers and workstations running Windows and Linux; perform staff onboarding

· Retrieve computers and other infrastructure; perform staff offboarding

· Maintain IT inventory, software & hardware

· Scans infrastructure and monitor performance

· Troubleshoot issues and outages

· Ensure security through access controls, backups and firewalls

· Perform new account set-up and Active Directory and Group Policy administration

· Manage Microsoft 365 and Azure infrastructure, especially Entra ID MFA and Exchange 365

· Design new computer systems and enhance server performance

· Manage staff user credentials, badges, and related systems (Kantech Entrapass, DMP SystemLink, and

HID AsureID and badge printer)

· Develop expertise to train staff in new technology

· Maintain and document credentials in LastPass Enterprise

· Document work using Atlassian Help Desk tickets and Confluence; document project work in Jira

· Manage the office’s Vonage VoIP system and Polycom IP phones

Provide on-call support during evenings and weekends as scheduled

Qualifications

Education:

BS in Information Technology, Computer Science or a related discipline; professional certification (e.g. Microsoft 365 Certified Administrator Expert) is a plus

Experience:

· Minimum of 4 years relevant experience with degree, 6 without

· Experience managing Microsoft 365, Entra ID MFA, Azure, Teams 365, Exchange 365, Defender 365 AV

required

· Proven experience as a Windows System Administrator; Linux/UNIX

· Experience with Windows Server (2016-2025) and upgrading to new releases required

· Server maintenance required, Dell and Asus server maintenance experience a plus

· Experience with basic networking (LAN/WAN) and patch management required; using Manage Engine

& WSUS a plus

· Experience with Atlassian Help Desk, Confluence, and Jira a plus

· Experience with LastPass Enterprise a plus

· Experience with Devolutions Remote Desktop Manager (RDM) a plus