Senior Maintenance Supervisor

The Role 

Entegris is currently seeking a Senior Maintenance Supervisor / Planner to join our Engineering & Maintenance team. This position will be based in our Aurora, Illinois facility. This combined role is responsible for both the direct supervision of maintenance technicians and electricians across all shifts and the end-to-end planning and scheduling of all maintenance activities within the 845 Slurry production area. 

In this role, you will ensure that the right people, parts, and plans are in place before every maintenance window — minimizing unplanned downtime and maximizing wrench time. You will own the site's maintenance results as measured by key performance indicators while fostering a culture of safety, continuous learning, and operational excellence. 

The position reports to the Sr. Maintenance Manager and operates within a state-of-the-art facility that runs three shifts, five days a week. The Senior Supervisor / Planner also serves as backup to the Senior Maintenance Manager during planned time off, ensuring seamless operations and team leadership continuity. 

What You’ll Do 

Team Leadership & Supervision 

• Directly supervise maintenance technicians and electricians across all shifts; ensure appropriate staffing levels are maintained to effectively support operations at all times. 

• Hire, onboard, and train new maintenance technicians; manage payroll, punch times, and time-off requests to ensure compliance with department attendance policies. 

• Provide technical guidance and coaching to the maintenance team; drive cascading goal setting, performance feedback, and individual development planning. 

• Serve as backup to the Maintenance Manager during PTO, assuming responsibility for broader maintenance operations and team leadership. 

Maintenance Planning & Scheduling 

• Develop and publish a rolling weekly and monthly maintenance schedule encompassing all preventive maintenance (PM), corrective work orders, and project-related activities — balancing production needs with maintenance resource availability. 

• Manage the work order backlog: review, prioritize, and assign work orders; monitor aging; ensure work is completed within target timeframes and escalate overdue items as needed. 

• Coordinate parts kitting and pre-staging — confirm all materials, tools, and documentation are ready before scheduled maintenance windows to maximize technician wrench time. 

• Coordinate required downtime windows with production, operations, and quality teams to align planned maintenance activities with production schedules and minimize impact to output. 

Maintenance Program Ownership 

• Utilize SAP-PM, Parsable, and Reliance ETQ to create, modify, implement, and over