IT Systems Administrator - Microsoft 365 & AD

Sean S. Green

Lansing, IL 312-***-**** ********@******.***

LinkedIn: linkedin.com/in/sean-s-green-25141289

PROFESSIONAL SUMMARY

Experienced IT Systems Administrator with 10+ years supporting enterprise environments across healthcare, government, and consulting sectors. Skilled in Windows Server, Active Directory, virtualization, and Microsoft 365. Proven track record improving system reliability and reducing downtime.

CORE TECHNICAL SKILLS

• Windows Server (2012–2019), Active Directory, Group Policy

• Microsoft 365, Exchange, Teams

• VMware vSphere, Hyper-V

• VPN, network troubleshooting, endpoint security

• SolarWinds, PowerShell

• Desktop & remote support, ticketing systems

PROFESSIONAL EXPERIENCE

IT Consultant / Systems Administrator

Freelance – Lansing, IL / Remote May 2021 – Present

• Manage server environments, Active Directory, and Group Policy

• Implement Microsoft 365 and virtualization platforms

• Provide white-glove technical support

• Support enterprise infrastructure projects

Desktop Support Engineer II

Geosyntec Consultants Nov 2018 – May 2021

• Supported 160+ users across hardware and network environments

• Administered Active Directory, Office 365, VPN

• Managed CAD software deployment

• Automated tasks using PowerShell

System Administrator

U.S. Railroad Retirement Board Dec 2017 – Nov 2018

• Managed Windows Server infrastructure

• Reduced downtime by 30% through patch improvements

• Administered VMware and Exchange

• Built and deployed system images

Desktop Support Engineer II

Northwestern Memorial Hospital Mar 2014 – Dec 2017

• Supported up to 10,000 users

• Provided Epic, Citrix, and Office support

• Troubleshot network and device issues

Desktop Support Engineer

Northwestern Memorial Hospital Aug 2010 – Mar 2014

• Led deployment of 8,000+ devices

• Supported Windows migrations and Exchange upgrades

EDUCATION

MS, Information Technology – Purdue University Global (GPA: 3.94)

CERTIFICATIONS

CompTIA A+, Network+, Security+ Microsoft MCP MD-100

VOLUNTEER EXPERIENCE

American Red Cross – Disaster Action Team Volunteer

HONORS

Golden Key Honor Society Student Advisory Board Member

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