We are looking for a highly skilled Senior Systems Administrator to join our team in Dallas, Texas. This role requires a detail-oriented individual capable of managing and maintaining complex IT infrastructure while supporting critical business applications. The ideal candidate will possess strong technical expertise and a commitment to delivering quality service in a dynamic environment.<br><br>Responsibilities:<br>• Oversee and maintain data center infrastructure supporting legacy platforms and associated applications.<br>• Address IT service requests and incidents promptly while adhering to established processes and service level agreements.<br>• Conduct regular system monitoring, capacity planning, patch management, and implement change control procedures.<br>• Collaborate with global IT teams to support thousands of users across multiple international locations.<br>• Participate in IT projects focused on infrastructure upgrades and optimization strategies.<br>• Handle sensitive and proprietary information with the utmost confidentiality and professionalism.<br>• Ensure reliable operation of Active Directory, Exchange (both on-premises and online), and Office 365 environments.<br>• Manage Azure services, Remote Desktop, Terminal Services, and other cloud-hosted IT solutions.<br>• Provide expertise in networking fundamentals, including WAN, SD-WAN, switches, and LAN configurations.<br>• Stay current with backup technologies and antivirus solutions to safeguard organizational data.

• Minimum of 5 years of experience in a Windows-based IT environment.<br>• Advanced knowledge of Active Directory, Microsoft Exchange, Office 365, and Azure services.<br>• Familiarity with Windows Server versions such as 2012, 2016, and 2019.<br>• Certifications from Microsoft, VMware, or Cisco are highly desirable.<br>• Solid understanding of networking concepts, including WAN, SD-WAN, and LAN.<br>• Experience with backup solutions, both cloud-based and on-premises.<br>• Proficiency in technologies like Dell VxRail, Nutanix, and Rubrik.<br>• Multilingual skills are an advantage but not required.

<h3 class="rh-display-3--rich-text">Technology Doesn't Change the World, People Do.^®</h3> <p>Robert Half is the world’s first and largest specialized talent solutions firm that connects highly qualified job seekers to opportunities at great companies. We offer contract, temporary and permanent placement solutions for finance and accounting, technology, marketing and creative, legal, and administrative and customer support roles.</p> <p>Robert Half works to put you in the best position to succeed. We provide access to top jobs, competitive compensation and benefits, and free online training. Stay on top of every opportunity - whenever you choose - even on the go. <a href="https://www.roberthalf.com/us/en/mobile-app" target="_blank">Download the Robert Half app</a> and get 1-tap apply, notifications of AI-matched jobs, and much more.</p> <p>All applicants applying for U.S. job openings must be legally authorized to work in the United States. Benefits are available to contract/temporary professionals, including medical, vision, dental, and life and disability insurance. Hired contract/temporary professionals are also eligible to enroll in our company 401(k) plan. Visit <a href="https://roberthalf.gobenefits.net/" target="_blank">roberthalf.gobenefits.net</a> for more information.</p> <p>© 2025 Robert Half. An Equal Opportunity Employer. M/F/Disability/Veterans. By clicking “Apply Now,” you’re agreeing to <a href="https://www.roberthalf.com/us/en/terms">Robert Half’s Terms of Use</a>.</p>