Systems Administrator - Corporate IT

The Systems Administrator is a highly skilled IT engineer focused on the Microsoft 365 E5 suite, including Azure AD / Entra , Exchange Online, SharePoint Online, Teams, Intune, Defender, Power Platform, and related technologies. The role requires expertise in both cloud and on-premises management across Azure, Microsoft Server, Cisco, Linux, disaster recovery, high availability, and business continuity planning. A proactive mindset, excellent problem‑solving skills, and the ability to mentor a team of engineers are essential.

• Oversee the configuration, administration, and optimization of the Microsoft 365 suite, including Exchange Online, Teams, SharePoint, Intune, Defender, Azure AD / Entra , and Power Platform
• Regularly audit systems to ensure they are designed and operating according to current best practices
• Manage mobile device policies and provisioning with Intune, as well as lifecycle management of Teams and SharePoint sites
• Administer Exchange Online, including mail security (SPF, DMARC, DKIM) and protection against spam, malware, and phishing
• Implement Single Sign‑On for enterprise‑wide applications using Microsoft Azure AD / Entra
• Manage servers, including latest Windows Server versions, Linux, and appliance‑based virtual machines
• Design, deploy, and administer HyperV virtualization systems in on‑premises data centers
• Design and deploy cloud‑based virtualization environments, including Microsoft Azure
• Deploy, manage, and analyze infrastructure‑wide monitoring tools to ensure optimal system operation
• Design and maintain internal networks for both data centers and branch offices
• Manage Cisco / Meraki firewalls, routers, and switches
• Troubleshoot and resolve network‑related issues, analyzing root causes to ensure design resiliency
• Oversee circuit management and vendor coordination
• Manage internal telephony via Cisco and Teams
• Develop and maintain Disaster Recovery (DR), High Availability (HA), and Business Continuity Planning (BCP) strategies for critical systems
• Ensure backup and archiving strategies are appropriately deployed across platforms
• Conduct regular testing and drills to validate the effectiveness of DR, HA, and BCP plans
• Assist the IT security team with day‑to‑day security and compliance tasks
• Lead the vulnerability management program’s patching design, implementation, and monitoring
• Manage multi‑factor authentication technologies
• Implement processes and systems in alignment with existing compliance and regulatory requirements
• Design, develop, and maintain IT integrations such as HR IS platform to Microsoft Azure AD / Entra
• Automate user onboarding and off‑boarding through scripting
• Act as an escalation point for the help desk team on complex trouble tickets
• Assist in the design and implementation of automated configuration for both Windows and Mac endpoints
• Manage branch office networking, printing, and physical security
• Collaborate with business and IT teams to ensure designs meet requirements
• Develop documentation of processes and knowledge‑base articles for systems as they are designed and deployed

• Bachelor’s degree in computer science, programming, information security, or a related field
• Equivalent work experience or certifications may be considered
• 3–5 years of systems administration experience with a strong focus on M365 E5
• Team mentoring or leadership experience
• Demonstrated problem‑solving and analytical skills
• Expert level knowledge of DNS, DHCP, certificates, SMTP, SNMP, SSL, SSH, DMARC, DKIM, SPF, web and application hosting, virtualization, and physical security
• In‑depth knowledge of Cisco networking, including routers, switches, and firewalls
• Experience with integration development and maintenance, including scripting and programming
• Proficiency in HyperV virtualization and Azure cloud services
• Expertise in Disaster Recovery (DR), High Availability (HA), and Business Continuity Planning (BCP)
• Mac management experience
• Excellent problem‑solving and troubleshooting skills
• Ability to work independently and collaboratively in a team environment
• Proficient, or able to gain proficiency with, a broad array of platforms and tools
• Occasional travel…