Senior Systems Administrator

Realty Income aims to be a globally recognized leader in the S&P 100, committed to creating long-term value for all stakeholders. These stakeholders include our dedicated team members, who embody our purpose: building enduring relationships and brighter financial futures. This guiding principle serves as a beacon for our team, influencing every action we take.

Realty Income’s employees consistently invest their time, commitment, and dedication into the company, and in turn, they receive investment returns in the form of purpose, belonging, and opportunities for advancement. 

Realty Income is committed to best-in-class corporate responsibility practices through environmental initiatives, governance programs, and community outreach projects. From the boardroom to the breakroom, our team members make a difference every day.

Position Overview:   

The Senior System Administrator is responsible for the design, implementation, maintenance, and day-to-day operations of computing and networking infrastructure across multiple locations, both on-premises and cloud-based. This role plays a key part in developing and executing IT strategies that align with business objectives and company technology goals. The Senior System Administrator oversees new initiatives from design to implementation and ensures proper documentation, operation, and maintenance of existing solutions.

Key Responsibilities:

Administration and Maintenance of Hybrid Enterprise Server and Network Infrastructure 

• Manage both on-premises and cloud-based corporate networking infrastructure.
• Oversee the complete lifecycle of network servers, from design and implementation to retirement.
• Ensure proper management policies are applied to all server instances.
• Administer and maintain on-site data storage systems.
• Manage and maintain the on-site VMware virtualization platform.
• Configure, maintain, upgrade, and replace corporate firewalls, access switches, and routers.
• Design, maintain, and monitor infrastructure health dashboards for servers, internet connectivity, and cloud services.
• Monitor and manage all company ISP connections.
• Plan and implement feature and OS upgrades for Windows and Linux servers.
• Securely configure and manage company DNS services.

Active Directory, Microsoft 365, and Entra ID Services 

• Administer Active Directory, Microsoft 365, Azure, and Entra ID in collaboration with Information Security and Enterprise Applications teams.
• Design and maintain all aspects of Microsoft Active Directory, including domain controllers, AD Entra Connect, and third-party integrations.
• Monitor, audit, and alert on administrative changes in Active Directory (e.g., group membership changes, group creation/deletion, privilege escalation).

Other Responsibilities: 

• Coordinate changes to Okta Single Sign-On with the Information Security team.
• Design and maintain Role-Based Access Controls (RBAC) for the organization.
• Design and administer the company’s data backup and restoration platform. 
• Assist the Director of IT Service and Support with SOX audit tasks, including preparation of audit materials and facilitating walk-throughs for in-scope systems and platforms.
• Review and remediate security vulnerabilities related to server and network infrastructure.
• Serve as the primary escalation point for technical issues raised by the Service Desk and Information Security teams.
• Provide occasional after-hours or weekend support as needed.
• Performs other duties as assigned. 

Qualifications:

• A qualified candidate is typically expected to have 5+ years of relevant experience in a similar role.
• In-depth expertise in managing Windows-based server and desktop operating systems.
• Proficient in Cisco and Meraki networking and telecommunications platforms.
• Comprehensive knowledge of Microsoft Azure (multi-geo experience is a plus).
• Strong understanding of core networking concepts, including Single Sign-On (SSO) and Multi-Factor Authentication (MFA).
• Expertise in storage and storage networking technologies.
• Skilled in managi