Senior Systems Administrator in Plainview, New York at Eagle Rock Properties

About Us:

Eagle Rock Properties, headquartered in New York, is a full-service real estate firm offering investment management, property management, and construction management services. With a team of over 350 professionals, we specialize in rental apartment communities across the Northeast and Mid-Atlantic regions of the United States. Under the leadership of our executives, who have owned and managed properties for more than 30 years, Eagle Rock Properties has emerged as a pioneering force in the industry.

Job Description:

The successful candidate will play a key role in the implementation, migration, security, and support of both our on-premises and cloud-based services. The candidate will collaborate with senior IT and executive staff on all security and cloud-based initiatives.

Responsibilities

• Implement and maintain Microsoft 365 security and compliance configurations across Intune, Entra ID, and related services.
• Serve as Tier 2 / escalation support for complex and high-impact technical issues.
• Administer and optimize SharePoint, OneDrive, Teams, and Exchange Online environments.
• Develop and enforce device, application, and configuration policies through Intune and Entra ID.
• Manage data governance, classification, discovery, and protection using Microsoft Purview tools.
• Implement and manage modern authentication standards including FIDO2, passkeys, and Conditional Access policies.
• Ensure alignment with organizational IT standards, policies, and security baselines.
• Maintain and publish clear, detailed documentation for configurations, policies, and operational procedures.
• Contribute to continuous security hardening and improvement of Microsoft Secure Score.

Requirements

• 5+ years of experience in IT systems and Microsoft 365 administration.
• 5+ years of experience with Active Directory, Entra ID, Intune, PowerShell, and automation.
• Strong grasp of cybersecurity fundamentals and best practices especially NIST-CSF.
• Demonstrated ability to lead or contribute to migration projects (AD → Entra ID, SMB → SharePoint).
• Familiar with migration to phish resistant MFA technologies, passkeys/FIDO2.
• Experience with SAML / OAuth2 / FIDO2 / Passkey authentication and Conditional Access policies.
• Familiarity with NIST CSF controls.
• Proven problem-solving skills, attention to detail, and proactive mindset.
• Excellent communication and collaboration abilities.

Preferred Certifications:

• CompTIA (Sec+, CySA, Cloud+)
• Microsoft (MS-102, MD-102, SC-300, AZ-104)