Senior Systems Administrator - Contract

KEY RESPONSIBILITIES

• Microsoft Exchange Administration
• Administer, monitor, and maintain hybrid Exchange 2016 and Exchange Online infrastructure.
• Troubleshoot mail flow, Microsoft Entra Connect, and third-party service integrations (e.g., NetSuite, ADP, Lever).
• Administer Proofpoint email security solutions to enhance protection against spam, malware, and phishing threats.
• Plan and execute system upgrades, patches, and configurations for optimal performance.


• Hybrid Active Directory & Entra ID Management
• Install, configure, and secure Domain Controllers (DCs) and manage GPOs.
• Administer Azure AD Connect for hybrid AD synchronization and manage conditional access policies.


• Endpoint Security & Microsoft Defender for Endpoints
• Configure and manage endpoint security policies using Group Policy and Microsoft Security Portal.
• Conduct threat analysis and respond to security incidents following IT protocols.
• Perform vulnerability scans and collaborate on remediation strategies.


• Windows Server & Infrastructure Administration
• Automate and standardize Windows Server deployment (physical/virtual).
• Maintain Active Directory Certificate Services (AD CS) for secure communications.
• Manage Intel AMT/vPro servers for remote workstation administration.
• Administer Windows Server Update Services (WSUS) for patch management and compliance.
• Collaborate with vendors on new product evaluations and proof of concepts.
 
• Dell PowerScale (Isilon) Cluster Administration
• Serve as the primary administrator for Dell PowerScale (Isilon) storage.
• Create and manage file shares and quotas according to company policies.
• Troubleshoot and remediate hardware failures, performance issues, and connectivity problems.
 
• Backup Responsibilities & Additional IT Duties
• Provide backup support for physical access control systems (S2 Lenel).
• Work with cross-functional teams to support security and infrastructure initiatives.

EXPERIENCE AND QUALIFICATIONS:

• Required Skills & Experience:
• 5+ years managing Hybrid Microsoft Exchange Server and Microsoft Exchange Online.
• 5+ years supporting Hybrid Microsoft AD & Entra ID environments.
• Experience with Microsoft Defender for Endpoints and enterprise endpoint security solutions.
• Proficiency in PowerShell or Python scripting for task automation.
• Strong problem-solving and communication skills with the ability to work independently.
• Bachelor’s degree in IT, Computer Science, Cybersecurity, or equivalent experience (6+ years).
 
• Preferred Qualifications:
• Experience in a help desk escalation role for 150+ users.
• Familiarity with JIRA, Confluence or Perforce for IT documentation and issue tracking.
• Relevant certifications (e.g., Windows Server Hybrid Administrator Associate).
• SAN Administration experience is a plus.

Additional Requirements

• U.S. Citizenship or Permanent Residency (due to export-controlled materials).
• Ability to respond to urgent infrastructure needs and manage IT service tickets effectively.

SUPERVISORY REQUIREMENTS:

• None