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%)

Low Temperatures Rarely (0-15%)

Noises Moderate (business office with computers, printers and light office noises)

Fumes Exposure Rarely (0-15%)

Required Minimum Qualifications

• This position requires U.S. Person status as defined by applicable law for authorized access to data controlled under the International Traffic in Arms Regulations (ITAR). A U.S. Person includes U.S. Citizens, U.S. Nationals, lawful permanent residents, and workers granted refugee or asylum status in the United States.
  
  

Note: This Job Description in no way states or implies that these are the only duties to be performed by the employee occupying this position. Employees will be required to follow any other job-related instructions and to perform any other job-related duties requested by the Supervisor. All requirements are subject to change and updates.

We also provide eligible employees with a competitive benefits package that includes health insurance, flexible spending accounts, health savings account, 401k savings plan, life and disability insurance, tuition assistance and more, to meet the diverse needs of all employees and their family members.

Equal Opportunity Employer:

Greene, Tweed is an Equal Opportunity Employer. Employment decisions are made without regard to race, color, religion, gender, sexual orientation, gender identity, national origin, age, physical or mental disability, veteran status, or any other federally protected class.

Drug Free Workplace:

Greene, Tweed is a Drug Free Workplace. Employment is contingent upon successful completion of a pre-employment drug screening and background investigation subject to federal, state, and local laws.

NOTE: Greene, Tweed is not seeking assistance or accepting unsolicited resumes from search firms for employment opportunities, unless they have a written agreement for the position they are contacting us about. Regardless of past practice, all resumes submitted by search firms to any employee at GT without a valid written search agreement in place for that position will be deemed the sole property of Greene, Tweed, and no fee will be paid in the event the candidate is hired by Greene, Tweed as a result of the referral or through other means.