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Operating Engineer - Data Center

Jones Lang LaSalle · Elk Grove Village, IL · Full time

Posted Sep 25, 2026 · We last checked this listing on Oct 6, 2026

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Likely interview questions for this role

Written from this job description, not a generic list. Each one notes what the interviewer is really checking.

About your past

Tell me about a time you followed a procedure exactly even though you thought you knew a faster way.

What they are checking: Whether they respect written procedures, since shortcuts in a data center can take down a customer.

Tell me about the most serious equipment failure you've responded to. What did you learn?

What they are checking: Whether they stay steady in a real emergency and take lessons from it.

How do you keep up your skills on equipment like UPS systems and generators that rarely fail?

What they are checking: Whether they practice and study so they are ready when rare events do happen.

What would you do

You're on second shift and an STS alarms with no obvious cause. Who do you call and what do you do before they arrive?

What they are checking: Whether they escalate correctly and stabilize safely rather than experimenting on live power equipment.

The shift is Friday through Tuesday, 2 to 10 p.m. How have you handled schedules like that before?

What they are checking: Whether they have honestly thought about the schedule so they will stay in the role.

About the work

The goal here is 100% uptime. Walk me through what happens when utility power drops at a data center, from the first second to when the generators carry the load.

What they are checking: Whether they truly understand the UPS, ATS and generator sequence they will be trusted to watch and recover.

What's the difference between a CRAC and a CRAH unit, and what would you check if one alarmed on high supply temperature?

What they are checking: Whether they know data center cooling equipment well enough to respond correctly to alarms.

How do you do maintenance on a critical system without putting the load at risk?

What they are checking: Whether they rely on method of procedure, redundancy checks and approvals before touching live critical equipment.

What does arc flash safety look like on medium voltage switchgear?

What they are checking: Whether they take electrical hazards seriously and know PPE and boundary rules for MV work.

How do you document rounds and readings so the next shift can spot a trend?

What they are checking: Whether their records are useful for catching slow failures across shifts.

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The full job description

As published by Jones Lang LaSalle.

JLL empowers you to shape a brighter way . Our people at JLL are shaping the future of real estate for a better world by combining world class services, advisory and technology for our clients. We are committed to hiring the best, most talented people and empowering them to thrive, grow meaningful careers and to find a place where they belong. Whether you’ve got deep experience in commercial real estate, skilled trades or technology, or you’re looking to apply your relevant experience to a new industry, join our team as we help shape a brighter way forward. Job Description IUOE Local 399 Shift Time : 2nd shift: 2:00pm-10:00pm (Fri-Tues) Wed and Thursday off What this job involves: The Data Center Operating Engineer is responsible for delivery of best practice systems and problem resolution on all data center electrical and mechanical infrastructure (UPS, MV electrical systems, generators, cooling systems etc.) What is your day to day? • Responsible for maintaining, monitoring, and performing preventive maintenance and continuous operation of all building systems to maintain 100% Up-time including: fire/life safety, mechanical systems such as (HVAC, chillers, crac, crah, plumbing, controls), electrical including emergency backup systems such as (lighting, UPS, ATS, STS, PDU, generators, primary switchgear, power distribution, transformers), and hot water systems. • Monitors operation, adjusts, and maintains refrigeration, chilled water, and air conditioning equipment; boilers, and ventilating and water heaters; pumps, valves, piping, and filters; other mechanical and electrical equipment. • Must record readings and make and adjust where necessary to ensure proper operation of equipment. • Requires the ability to analyze the operation of various systems, determine the cause of any problems/malfunctions and take corrective action as required. • Comply with departmental policy for the safe storage, usage, and disposal of hazardous materials. • Maintains a clean and safe workplace. • Learn and understand the data center site in-order to manage incidents and events that put the critical systems at risk. • Work order management, including CMMS, Vendor Management, and Customer Facing Tickets. • Understanding and complying with emergency escalation procedures. • Perform additional job duties as required. Why You'll Love This Role: • Work with cutting-edge technology in a fast-growing industry. • Clear career advancement opportunities in critical infrastructure. • Be part of a team that literally keeps the digital world running. Desired experience and technical skills Required IUOE Local 399 • 2+ years' experience working in a data center/critical facility. • Experience with building systems, including UPS systems, emergency generators, and switchgears. • Demonstrated verbal/written communication skills. • Working knowledge of computer applications including MS Office (Word, Excel, Outlook), Google Suite and CMMS. Preferred • Corrigo experience • Universal EPA 608 certification • Trained in NFPA70E Physical Work Abilities & Requirements: This position requires frequent walking, climbing, bending, kneeling, lifting, stooping, and working/extending overhead, including: • Walking large, campus-like settings. • Lifting a minimum of 50 lbs. • Climbing stairs and navigating rooftops to access equipment. • Using ladders up to 30 ft and working from heights. • Ability to Climb a ladder with a 300-lb weight limit. • Must be able to work different schedules. • Must be able to work Holidays. • Must be able to respond to site emergencies. Position is onsite in Elk Grove Village, IL. #HVACjobs At JLL, we are collectively shaping a brighter way — for our clients, ourselves and our fellow employees. We choose to take the more inspiring, innovative, and optimistic path on our journey toward success. What sets JLL apart is our culture of collaboration, locally and across the globe, which allows us to create transformative solutions for the real estate industry. We support each other's wellbeing and champion inclusivity and belonging across teams. JLL is an Equal Opportunity Employer committed to diversity and inclusion This position does not provide visa sponsorship. Candidates must be authorized to work in the United States without sponsorship. Expected compensation for this position: 103,667.00 – 103,667.20 USD per year Final compensation packages are determined by various considerations including but not limited to candidate qualifications, location, market conditions, and internal considerations. Location: On-site –Elk Grove Village, IL If this job description resonates with you, we encourage you to apply, even if you don’t meet all the requirements. We’re interested in getting to know you and what you bring to the table! Personalized benefits that support personal well-being and growth: JLL recognizes the impact that the workplace can have on your wellness, so we offer a supportive culture and comprehensive benefits package that prioritizes mental, physical and emotional health. Some of these benefits include: • 401(k) plan with matching company contributions • Comprehensive Medical, Dental & Vision Care • Paid parental leave at 100% of salary • Paid Time Off and Company Holidays • Early access to earned wages through Daily Pay At JLL, we harness the power of artificial intelligence (AI) to efficiently accelerate meaningful connections between candidates and opportunities. Using AI capabilities, we analyze your application for relevant skills, experiences, and qualifications to generate valuable insights about how your unique profile aligns with the specific requirements of the role you're pursuing. JLL Privacy Notice Jones Lang LaSalle (JLL), together with its subsidiaries and affiliates, is a leading global provider of real estate and investment management services. We take our responsibility to protect the personal information provided to us seriously. Generally the personal information we collect from you are for the purposes of processing in connection with JLL’s recruitment process. We endeavour to keep your personal information secure with appropriate level of security and keep for as long as we need it for legitimate business or legal reasons. We will then delete it safely and securely. For more information about how JLL processes your personal data, please view our Candidate Privacy Statement . For additional details please see our career site pages for each country. For candidates in the United States, please see a full copy of our Equal Employment Opportunity policy here . Jones Lang LaSalle (“JLL”) is an Equal Opportunity Employer and is committed to working with and providing reasonable accommodations to individuals with disabilities. If you need a reasonable accommodation because of a disability for any part of the employment process – including the online application and/or overall selection process – you may email us at HRSCLeaves@jll.com . This email is only to request an accommodation. Please direct any other general recruiting inquiries to our Contact Us page > I want to work for JLL. Pursuant to the Arizona Civil Rights Act, criminal convictions are not an absolute bar to employment. Pursuant to Illinois Law, applicants are not obligated to disclose sealed or expunged records of conviction or arrest. Pursuant to Columbia, SC ordinance, this position is subject to a background check for any convictions directly related to its duties and responsibilities. Only job-related convictions will be considered and will not automatically disqualify the candidate. California Residents only If you are a California resident as defined in the California Consumer Privacy Act (CCPA) please view our Supplemental Privacy Statement which describes your rights and disclosures about your personal information. If you are viewing this on a mobile device you may want to view the CCPA version on a larger device. Pursuant to the Los Angeles Fair Chance Initiative for Hiring Ordinance, JLL will consider for employment all qualified Applicants, including those with Criminal Histories, in a manner consistent with the requirements of applicable state and local laws, including the City of Los Angeles’ Fair Chance Initiative for Hiring Ordinance. Pursuant to the San Francisco Fair Chance Ordinance, we will consider for employment qualified applicants with arrest and conviction records. Accepting applications on an ongoing basis until candidate identified.

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