Senior Systems Administrator

At Greene, Tweed, you'll find the cutting-edge technology, world-class polymer expertise and endless advancement opportunities you'd expect from a multi-national industry leader. You'll find them all in an environment that embraces diversity in people and opinions, moves decision making to the point of impact, and celebrates your success.

If you enjoy continuous learning and are excited about working with and creating technological solutions, explore career opportunities with Greene, Tweed.

Essential Duties/Responsibilities:  

• Support the development and administration by acting as an SME for Entra ID to support account creation and maintenance, Conditional Access policies, SAML Enterprise Apps for SSO integration, and the rest of the M365 stack (Microsoft Teams, OneDrive, Sharepoint, Exchange Online, Intune/Endpoint Manager, etc.)
• Globally administer Active Directory, Group Policy, DNS, DHCP, DFS, Print and File Servers, and other core services and supporting infrastructure.
• Administer and maintain Windows and Linux servers in a mixed hybrid (AWS, Azure) enterprise environment consisting of multiple technologies and roles of VMWare, Hyper-V, DNS, DHCP, SQL, Terminal Server, FTP, etc.
• Administration and security management of Office 365 hybrid messaging technologies.
• Work with outside vendors to perform maintenance of server and datacenter technologies in remote offices.
• Automate recurring tasks using PowerShell and other scripting languages.
• Monitor systems performance, availability, and logs using enterprise monitoring tools.
• Collaborate with Greene Tweed cybersecurity, networking, and application teams to maintain secure and efficient operations for the business.
• Provide Tier 3 support for escalated technical issues and incidents.

Required Minimum Qualifications

Education/Certifications:  Bachelor’s Degree preferred, or equivalent work experience, Microsoft Certifications a plus

Skills and Experience: 

• 5+ years of related experience successfully installing, maintaining, upgrading and migrating Windows and Linux server environments, preferably global.
• Proficiency in:
  • Windows Server (2016/2019/2022/2025)
  • Active Directory & Entra ID (Azure AD)
  • PowerShell scripting and automation
  • Microsoft 365 administration (Exchange, Teams, SharePoint, etc.)
  • Virtualization (VMware vSphere and Microsoft Hyper-V)
• Experience with security best practices for identity, endpoint, and infrastructure hardening.
• Familiarity with Intune or other MDM solutions.
• Strong problem-solving and troubleshooting skills.
• Experience scripting languages for automation

Job Environment:

Physical Requirements:          

            Standing                                 Occasionally (16-45%)

            Sitting                                      Frequently (46-100%)

            Lifting                                      Up to 15lbs without assistance

            Carrying                                   Up to 15lbs without assistance

            Walking                                   Occasionally (16-45%)

            Hearing                                     Ability to detect noises with or without corrective device(s)

            Vision                                      Clarity of vision, with or without corrective lenses

Mental Requirements:            

            Problem Solving                       Occasionally (16-45%)

            Making Decisions                     Ability to make decisions that have a moderate impact

            Supervise                                  Rarely (0-15%)

            Interpret Data                           Frequently (46-100%)

            Organize                                   Occasionally (16-45%)

            Read/Write                               Frequently (46-100%)

            Communication                        Frequently (46-100%)

Work Environment

            High Temperatures                   Rarely (0-15%)