Senior System Administrator Azure, Exchange & Active Directory

Company Description 
Lumen Solutions Group Inc. is a technology consulting Services company based in Florida. We provide a wide array of experienced business and IT professionals supporting clients from solution design to implementation and support. We specialize in professional IT consulting services, IT Staffing, Business/IT Strategy, Business Process Blueprints, Enterprise Architecture, and Enterprise Transformation. 
  
Role: Senior System Administrator – Azure, Exchange & Active Directory
Location: 2 Broadway New York, NY, 10004 (5 Days onsite)
Job Type: Contract
 
Job Summary:
We are looking for a Senior System Administrator with proven experience designing, implementing, and supporting enterprise-scale hybrid cloud and on-premises environments. The ideal candidate will have deep expertise in Microsoft Azure, Exchange, Active Directory, and automation scripting, along with experience supporting complex multi-forest, hybrid infrastructures in production environments.

Key Responsibilities

• Design, implement, and maintain hybrid Azure/on-premises infrastructure.
• Administer and support enterprise Exchange and Active Directory environments.
• Lead cloud migration and infrastructure modernization initiatives.
• Troubleshoot complex enterprise client-server environments.
• Develop automation scripts and optimize Azure resources.
• Support enterprise infrastructure projects and mentor junior technical staff.

 
Required Qualifications

• Microsoft Azure – 10+ years (Microsoft Certification preferred).
• Microsoft Exchange – Hybrid & Multi-Org enterprise environments.
• Microsoft Active Directory – Multi-Forest Hybrid administration.
• PowerShell / Unix Shell Scripting.
• Windows Server & Unix/Linux Administration.
• Microsoft Entra Connect, SCCM, ExpressRoute.
• DNS, PKI, Group Policy, SQL Server.
• Enterprise Infrastructure Design, Solution Architecture & Cloud Migrations.
   

Lumen Solutions Group Inc is an equal opportunity employer. All qualified applicants will be considered for employment without regard to any legally protected status.