Senior Maintenance Technician

Senior Maintenance Technician – JLL

As a Senior Maintenance Technician at JLL, you’ll be the operational backbone ensuring our client’s critical utility systems run safely, efficiently, and reliably. You’ll take ownership of central plant equipment—including boilers, chillers, cooling towers—and building HVAC systems that power a high‑performance facility. Your technical expertise in preventative maintenance, advanced troubleshooting, and system optimization directly supports seamless operations in a dynamic environment.

This role demands a blend of hands‑on mechanical skill, technical precision, and unwavering commitment to safety and regulatory compliance.

• Perform routine building rounds to inspect all utility equipment, mechanical rooms, and monitor operational parameters via Building Automation Systems (BAS) and physical gauges
• Execute comprehensive preventative maintenance programs on boilers, chillers, cooling towers, pumps, motors, compressors, and control valves in accordance with established schedules
• Diagnose and troubleshoot mechanical, electrical, and control system failures; perform repairs to restore systems to optimal performance
• Collaborate with utility system engineers, mechanics, and contractors to start, stop, and adjust equipment settings for maximum efficiency and environmental control
• Conduct chemical testing and treatment of boiler, cooling tower, and closed‑loop water systems in accordance with established programs
• Accurately complete all work orders, maintenance logs, and documentation in the CMMS; maintain organized inventory of parts and tools in accordance with MRO storeroom procedures
• Strictly follow safety procedures including Lockout/Tagout (LOTO) protocols and ensure all work complies with applicable codes and standards (NFPA, ASME, EPA)

• High School Diploma or GED
• Philadelphia Class A Boiler Operator License (mandatory)
• EPA Section 608 Universal Refrigerant Certification (mandatory)
• Minimum 5 years of hands‑on experience operating and maintaining large‑scale commercial or industrial utility systems
• Strong mechanical and electrical troubleshooting skills with ability to read and interpret blueprints, schematics, and technical manuals
• Proficiency with Building Automation Systems (BAS) such as Siemens and Vaisala
• Physical ability to lift up to 50 pounds, work in confined spaces and elevated areas, and stand/walk/climb ladders for extended periods in varying environmental conditions (hot boiler rooms, cold mechanical spaces)

• Associate’s Degree or Vocational/Technical training in HVAC, Refrigeration, or related field
• HVAC Technician Certification
• Experience with Carrier Chillers, Cleaver Brooks Boilers, and Atlas Copco compressors
• Life Sciences or Pharmaceutical facility experience
• Strong knowledge of steam generation principles, chilled water production, and air handling systems
• Experience utilizing specialized diagnostic tools and test equipment (multimeters, pressure gauges, flow meters)
• Excellent communication, problem‑solving skills, and basic computer proficiency for CMMS work order management

3001 Chestnut St., Philadelphia, PA 19104 (Onsite)

Monday to Friday, 1st shift (may be required to work evenings, weekends, and holidays as part of on‑call rotation or for emergency response)

This position does not provide visa sponsorship. Candidates must be authorized to work in the United States without sponsorship.

• 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

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  This email is only to request an accommodation.

Please direct any other general recruiting inquiries to our Contact Us page.

Accepting applications on an ongoing basis until candidate identified.