Senior Systems Administrator

Description

Thornburg is a global investment firm delivering on strategy for institutions, financial professionals and investors worldwide. The privately held firm, founded in 1982, is an active, high-conviction manager of fixed income, equities, and multi-asset solutions.

As an independent firm, Thornburg can take on a wide range of opportunities, explore ideas thoroughly and work across strategies to deliver consistent risk-adjusted out performance over the long term. The firm attracts free-thinking professionals who are eager to pursue investment outcomes beyond the confines of popular wisdom. From nimble operational capabilities to principles and actions fitting of a global citizen, Thornburg’s world-class investment platform and team are aligned on strategy to serve investors.

The Senior System Administrator is a key contributor to the stability, security, and modernization of Thornburg Investment Management’s technology environment. This role partners closely with IT leadership to design, implement, and optimize enterprise infrastructure across Microsoft, VMware, AWS, and Azure platforms. A major focus of this position is driving adoption of the latest Microsoft enterprise solutions—ensuring the organization fully leverages modern capabilities across Microsoft 365, Intune, Azure AD, and related cloud and security technologies.

The Senior System Administrator is responsible for both day-to-day operational excellence and ongoing transformation of core systems. This includes ensuring high availability, robust security, and strong performance across the environment while leading continuous improvements that enhance resilience, streamline operations, and align with regulatory and organizational standards. Success in this role requires a proactive, detail-oriented professional who combines deep technical expertise with a forward-looking mindset to help advance Thornburg’s enterprise technology roadmap.

This role requires a proactive, detail-oriented professional who can balance operational excellence with forward-looking enhancements, ensuring systems are resilient, well-documented, and aligned with organizational and regulatory requirements.

• Ensure the stability, availability, and performance of enterprise systems, proactively identifying opportunities to modernize infrastructure and strengthen operational resilience.
• Administer and enhance Windows Server environments (2016+), including patching, upgrades, automation, and lifecycle management aligned with modern Microsoft platform capabilities.
• Manage and optimize core identity and directory services - Active Directory, DNS, DHCP, and Group Policy - while advancing the organization’s use of cloud-based identity solutions such as Azure AD.
• Lead the adoption and administration of Microsoft 365 services, including Exchange Online, SharePoint Online, Teams, and related integrations, ensuring the business fully leverages new and emerging capabilities.
• Drive modernization of endpoint management through Microsoft Intune and Microsoft Endpoint Configuration Manager (MECM), improving device compliance, security, and user experience.
• Support and optimize VMware vSphere and VDI environments, ensuring a secure, scalable, and high-performing virtualization footprint.
• Strengthen security posture across SaaS platforms, implementing and improving controls such as SSO, MFA, Conditional Access, and ongoing access governance.
• Monitor enterprise systems using modern monitoring and analytics tools, proactively diagnosing issues, identifying trends, and implementing corrective and preventative actions.
• Execute and refine backup, recovery, and disaster resilience strategies to ensure data protection and continuity across hybrid environments.
• Enforce security standards and internal policies, collaborating with IT leadership to align operational practices with regulatory and organizational requirements.
• Support planned maintenance activities, including after-hours work when necessary, to maintain secure and reliable operations.
• Collaborate across IT and business teams, sharing expertise, contributing to technology roadmap initiatives, and…