Systems Administrator

South Burlington

**Description** We are seeking a Senior Systems Administrator to play a key role in maintaining, securing, and optimizing our client's enterprise infrastructure. The ideal candidate is a hands-on technical professional who enjoys solving complex infrastructure challenges, improving automation, and helping drive modernization across cloud and on-premises systems. Responsibilities * Administer and support Microsoft 365 services including Exchange Online, Entra ID (Azure AD), Teams, SharePoint Online, and OneDrive. * Manage endpoint deployment, configuration, compliance, and lifecycle management using Microsoft Intune and MDM solutions. * Maintain and troubleshoot Windows Server infrastructure, Active Directory, Group Policy, DNS, DHCP, and file services. * Support and administer Linux servers for application hosting, monitoring, and system maintenance. * Implement and maintain security controls across the environment, including MFA, Conditional Access, endpoint protection, vulnerability remediation, and identity governance. * Monitor infrastructure performance, availability, and security utilizing enterprise monitoring and logging tools. * Participate in security audits, risk assessments, incident response, and remediation efforts. * Manage user provisioning, access control, and role-based security policies. * Assist with backup, disaster recovery, and business continuity planning. * Develop and maintain system documentation, procedures, and technical standards. * Support infrastructure projects including migrations, upgrades, cloud adoption initiatives, and automation efforts. * Collaborate with vendors, business stakeholders, and internal IT teams to resolve issues and implement new technologies. **Requirements** * Experience in systems administration within a Microsoft-centric environment. * Strong experience administering Microsoft 365. * Hands-on experience with Microsoft Intune and Mobile Device Management (MDM). * Experience supporting hybrid cloud environments and identity management. * Strong knowledge of Active Directory, Group Policy, DNS, DHCP, and Windows Server administration. * Experience securing enterprise environments through MFA, Conditional Access, endpoint protection, and vulnerability management. * Working knowledge of Linux administration (Ubuntu, Red Hat, Rocky Linux, or similar). * Experience with PowerShell scripting and automation. * Strong troubleshooting and root-cause analysis skills. * Excellent communication and documentation abilities. Technology Doesn't Change the World, People Do. Robert Half is the world's first and largest specialized talent solutions firm that connects highly qualified job seekers to opportunities at great companies. We offer contract, temporary and permanent placement solutions for finance and accounting, technology, marketing and creative, legal, and administrative and customer support roles. Robert Half works to put you in the best position to succeed. We provide access to top jobs, competitive compensation and benefits, and free online training. Stay on top of every opportunity - whenever you choose - even on the go. Download the Robert Half app and get 1-tap apply, notifications of AI-matched jobs, and much more. All applicants applying for U.S. job openings must be legally authorized to work in the United States. Benefits are available to contract/temporary professionals, including medical, vision, dental, and life and disability insurance. Hired contract/temporary professionals are also eligible to enroll in our company 401(k) plan. Visit roberthalf.gobenefits.net for more information. 2025 Robert Half. An Equal Opportunity Employer. M/F/Disability/Veterans. By clicking "Apply Now," you're agreeing to Robert Half's Terms of Use and Privacy Notice.