Job Description

The Mechanical Maintenance Supervisor is responsible for leading all mechanical maintenance activities at the Tallgrass Cheyeene Energy Center-an off-grid, large-scale AI-dedicated critical power, multi-unit generation campus that is planned to produce approximately 2.5 GW of initial capacity with expansion capability up to 10 GW from a fleet of simple-cycle gas turbines and combined-cycle gas turbine (CCGT) technologies. This role provides direct leadership to mechanical craft personnel and contractors, ensuring safe, reliable, and cost-effective maintenance of gas turbines, steam turbines, HRSGs, and balance-of-plant systems through preventive, predictive, corrective maintenance and outage execution.

The Mechanical Maintenance Supervisor applies Human Performance (HP) principles and Tallgrass culture expectations to drive learning, accountability, and continuous improvement. The supervisor ensures Tallgrass values and HP principles are included in effective pre-job briefs, quality post-job reviews, robust event reporting and reviews are focused on process and system improvements rather than individual fault. The role owns mechanical execution quality and rework reduction, holding teams accountable for right the first-time work, defect elimination, and prevention of repeat failures, measured through KPIs including but not limited to rework rate, first-pass yield, defect recurrence, and schedule adherence.

The Mechanical Maintenance Supervisor works closely with Operations, Planning, Scheduling, Procurement, Reliability Engineering, Supply Chain, EHS, and the O&M Contractor to meet Tallgrass Energy's safety, regulatory, environmental, and mission critical data center commercial objectives.

Responsibilities

• Execute PM/CM activities on turbines, HRSGs, heat exchangers, pumps, compressors, gearboxes, valves, rotating equipment, and piping systems.
• Support major outage planning, scope development, and execution in partnership with Planning & Scheduling and Operations.
• Ensure high-quality work order management and backlog health using Maximo.
• Lead RCAs, defect elimination efforts, and predictive maintenance programs including vibration, thermography, lubrication/oil analysis, and ultrasonic inspections.
• Maintain documentation, OEM technical bulletins, torque specs, and as-built records.
• Ensure PSM/MOC compliance where applicable for mechanical integrity and pressure boundary work.
• Manage contractor scopes, budgets, quality, and schedule adherence.
• Mentor mechanical craft personnel and support continuous improvement initiatives.
• Supervise mechanical maintenance activities for combined-cycle systems, including HRSG pressure parts, duct burners, expansion joints, dampers, steam turbines, condensers, cooling water systems, and auxiliary steam equipment.
• Ensure maintenance execution accounts for thermal transients, startup/shutdown sequencing, and cycling impacts on mechanical components.
• Lead inspection, repair, and replacement activities for HRSG components, including tube systems, insulation, casing, stack components, and safety valves.
• Support steam turbine and condenser maintenance, including lube oil systems, gland seal systems, vacuum systems, circulating water systems, and condenser tube inspection and cleaning.
• Coordinate mechanical scopes during integrated outages to align gas turbine, HRSG, and steam turbine work windows.
• Lead mechanical root cause analyses for combined-cycle equipment failures and recurring defects, with emphasis on thermal fatigue, flow-accelerated corrosion, and condenser performance degradation.
• Ensure mechanical work packages, procedures, and as-built documentation accurately reflect combined-cycle system configuration.

Qualifications

JOB REQUIREMENTS:

Minimum requirements:

Education:

• High school diploma or equivalent

Experience/Specific Knowledge:

• 7+ years mechanical maintenance experience in large scale power generation or heavy industrial operations.
• 3+ years supervisory or leadership experience.
• Experience with gas and steam turbine components, HRSG systems, and rotating equipment.
• Proficiency in Maximo CMMS
• Intermediate proficiency level in MS Office applications that may include but are not limited to Outlook, Excel, Word, and PowerPoint.
• Certifications, Licenses & Registrations:
• Must possess and maintain a valid driver's license and a driving record satisfactory to the company and its insurers (for travel).

Competencies, Skills & Abilities:

• Technical certificate or an associate degree in Mechanical Maintenance.
• OSHA 30, rigging, vibration analysis (CAT I/II), weld inspection.
• Safety leadership and risk management.
• Technical troubleshooting and problem-solving.
• Planning, scheduling, and contractor coordination.

Physical Demands:

All of the physical requirements listed below are those that may be necessary for an employee to successfully perform the essential functions of this job. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions.

• Sitting; standing; walking or moving throughout facility; driving; talking; seeing (specific vision abilities required by this job include close vision, distance vision, color vision, peripheral vision, depth perception and ability to adjust focus); hearing; feeling; bending or stooping; squatting or crouching; reaching; kneeling; pushing; pulling; lifting up to 25 lbs.
• Must be able to sit for prolonged periods of time.
• The employee is regularly required to use hands to type, touch, handle, or feel. The employee is required to talk and hear. The employee is frequently required to stand and reach with hands and arms. The employee is occasionally required to walk and climb or balance. The employee must regularly lift and /or move up to 10 pounds and occasionally lift and/or move up to 25 pounds.
• Ability to work at heights, in confined spaces, and with required PPE.
• Participation in emergency response and abnormal operating condition management.

Working Conditions:

• Industrial environment requires presence during planned and unplanned outages, including nights, weekends, and holidays as needed.
• Required to carry a cell phone and be available to respond during working and non-working hours.
• May require travel 5-10% for training, vendor visits, and corporate meetings.

Supervisory Responsibility:

Yes

PREFERRED EDUCATION, EXPERIENCE, CERTIFICATIONS, COMPETENCIES, SKILLS, & ABILITIES:

Above the minimum requirements, not required but advantageous in this position:

Other responsibilities:

The above statements describe the general nature and level of work being performed. This position may perform other duties as assigned.