Job Description Summary About the Role We are building a pipeline of talented Critical Environments Operators across all experience levels - from associates just starting their careers in data center operations to seasoned lead technicians ready to mentor others and drive operational excellence. As a Critical Environments Operator at CyrusOne, you will be part of a 24/7/365 Operations & Maintenance team responsible for keeping mission-critical data center infrastructure running at peak reliability. You will operate, monitor, and maintain electrical, mechanical, and HVAC/R systems while upholding the highest standards of safety, workmanship, and customer service. Whether you are early in your career or bringing years of hands-on experience, there is a place for you here - and a clear path forward. **What You Will Do** + Monitor and operate data center mechanical, electrical, and HVAC/R systems to ensure continuous uptime and reliability + Respond to building system alarms, prioritizing critical load protection, equipment preservation, and root cause analysis + Execute Preventive Maintenance work orders and follow SOPs, MOPs, EOPs, and MMRs as appropriate + Use a Computerized Maintenance Management System (CMMS) to track work orders, labor hours, and PMs + Coordinate with contractors and vendors; enforce Lockout/Tagout and other safety protocols + Perform equipment and system operational modifications, including critical switching and safe working area setup + Maintain awareness of and compliance with all company, government, and client policies, procedures, and EHS requirements + At senior levels: provide mentorship to junior operators, lead critical switching events, and participate in capacity planning and reporting **Levels & Experience** This is an evergreen posting that supports hiring across four levels. The right level for you will be determined based on your experience and qualifications during the interview process. + **Level I:** No prior data center experience required. Ideal for candidates eager to learn data center O&M, with 0-2 years in operations, maintenance, or customer service roles. Strong safety mindset and willingness to learn are the most important qualities. + **Level II:** 3-5 years of experience in Tier 2, 3, or 4 data centers or a technical facility maintenance role. Entry-level skills in electrical, mechanical, or HVAC/R disciplines - whether through a degree, trade program, or hands-on work experience. Familiarity with CMMS and work order processes a plus. + **Level III:** 5-7 years of data center or building engineering experience. Journeyman-level skills in electrical, mechanical, or HVAC/R. Ability to operate independently, troubleshoot systems, stabilize operations during incidents, and guide less experienced team members. + **Level IV:** 7+ years of relevant experience with demonstrated expertise at the journeyman or master level. Active HVAC certification or Journeyman/Master Electrician license preferred. Proven ability to lead operational activities, manage vendor relationships, and support team development. **Schedule Requirements:** This position requires working rotating 12-hour shifts (6:00 AM to 6:00 PM for day shift, or 6:00 PM to 6:00 AM for night shift) following a repeating 14-day cycle: + **Week 1:** Work Monday & Tuesday, Off Wednesday & Thursday, Work Friday, Saturday & Sunday. + **Week 2:** Off Monday & Tuesday, Work Wednesday & Thursday, Off Friday, Saturday & Sunday. + **Rotation:** Shift assignments (Days/Nights) rotate on a 28-day cycle. **What We Are Looking For** + Strong commitment to safety - always + Clear verbal and written communication skills + Solid problem-solving and decision-making ability + Proficiency with personal computers, including Microsoft Word and Excel + Ability to manage multiple priorities in a fast-paced, high-stakes environment + Willingness to work a flexible schedule, including on-call rotation and extended hours during emergencies + Team-first mindset - promotes collaboration and shared success + Desire to provide the highest levels of service to internal and external customers **Work Environment** This role operates in a fast-paced, physically active data center environment. Candidates must be able to lift up to 50 pounds, perform considerable walking, bending, and standing, and be available for 24/7/365 shift work including after-hours emergency response. **Why CyrusOne?** + **Career growth** - a defined progression from Associate through Lead Operator and beyond, with ongoing investment in your development + **Cutting-edge work** - support AI, hyperscale, and cloud infrastructure for some of the world's most demanding customers + **Global scale** - be part of a team operating across North America, EMEA, and APAC + **Award-winning culture** - 2026 Top Workplaces USA National Award winner, recognized for our people-first environment + **Values-driven** - everything