IT Senior System Administrator

ABOUT US At PARTNER, success starts with the right mindset: connection, compassion, and curiosity. Whether consulting with clients or collaborating with colleagues, these principles guide how we work. We deliver engineering, environmental, and energy consulting, plus design services across the Americas, Europe, and beyond. As a leader in Commercial Real Estate (CRE), we’re 1,600+ professionals strong in 40+ offices.

Our mission is simple: create the best home for talented professionals. If you value delivering exceptional experiences through problem-solving, coordination, and a mindset of care for clients and colleagues, you’ll feel right at home. That approach has earned us recognition on ENR’s Top 500 Design Firms, Inc. 5000’s Fastest-Growing Companies, and Zweig’s Best Firms to Work For.

Here, your ideas matter, your impact is real, and your work helps shape the future. Check out this role and join our team of talented professionals. Learn more about Partner at  www.partneresi.com SUMMARY Partner is seeking an experienced Senior IT System Administrator to support, secure, and improve its Microsoft-centered technology environment. This role requires strong hands-on experience with Microsoft 365, Teams, networking, security, and server infrastructure.

Experience with SharePoint and Power Platform is a plus. The ideal candidate is a proactive problem solver who can troubleshoot complex issues, recommend practical solutions, strengthen governance, and help ensure the reliability, performance, and security of both cloud and on-premises systems. ESSENTIAL DUTIES AND RESPONSIBILITIES Administer, maintain, and support cloud and on-premises infrastructure, including servers, network devices, storage, firewalls, switches, routers, and related systems.

Manage Microsoft 365 services, including SharePoint, Teams, Power Platform, Entra ID, licensing, security, compliance, and collaboration tools. Troubleshoot and resolve hardware, software, network, communication, and end-user technology issues in a timely and professional manner. Analyze existing IT systems and processes to identify opportunities for improvement, automation, governance, security, and operational efficiency.

Plan and implement infrastructure upgrades, system enhancements, patches, configuration changes, and security improvements. Monitor system performance, availability, and security to identify and address potential issues before they become critical. Support disaster recovery and business continuity planning to help ensure systems can recover from disruptions or outages. Maintain accurate documentation for infrastructure, assets, configurations, change control processes, and operational procedures.

Collaborate with IT leadership, network administrators, cybersecurity resources, software developers, database administrators, vendors, and other stakeholders to deliver reliable technology services. Provide clear training, guidance, and support to end users to help them use technology systems and applications effectively. Stay current with emerging infrastructure, security, collaboration, and Microsoft 365 technologies, and recommend solutions that improve productivity and service quality.

  KNOWLEDGE, SKILLS, AND ABILITIES Strong customer-service mindset with a professional, approachable, and solutions-oriented communication style. Ability to work independently and collaboratively with minimal supervision while managing priorities and meeting deadlines. High attention to detail, strong organizational skills, and a commitment to accurate, high-quality work. Strong analytical and problem-solving skills, with the ability to research technical issues and develop practical recommendations.

Passion for continuous learning and staying current with evolving technologies, security practices, and infrastructure trends. QUALIFICATIONS Minimum of 5 years of recent systems administration experience, preferably in a multi-office or geographically