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Assistant Plant Manager

O-I

Wheat Ridge, CO, United States permanent

Posted: April 14, 2026

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Quick Summary

We are looking for a highly experienced Assistant Plant Manager to join our team, responsible for managing the production of glass containers for our clients. The ideal candidate will have extensive experience in plant management, quality control, and supply chain management. The successful candidate will be responsible for ensuring the efficient operation of the plant, managing teams, and driving business growth through process improvements.

Job Description

About O-I

Remember the last time you opened a bottle of champagne? A cold beer after a hard day’s work or a bottle of sparkling mineral water to quench your thirst? Well, it was probably made by us. We are O-I and we love that we make more glass containers than anyone in the world. 

O-I has more than a century of experience crafting pure, sustainable, brand-building glass packaging for many of the world’s best-known food and beverage brands. We are proud to provide high-quality glass packaging for beer, wine, spirits, food, non-alcoholic beverages, cosmetics and pharmaceuticals. 

Why do you want to apply? Rocky Mountain Bottle Company (RMBC) is a joint venture between O‑I Glass and Molson Coors Beverage Company, formed to manufacture glass containers—primarily beer bottles—close to Molson Coors’ major brewing operations in Colorado.  It is strategically positioned near Denver‑area breweries and recycling infrastructure

The Assistant  Plant Manager is accountable for planning, directing, and coordinating all manufacturing activities. Leads focus on continuous plant improvement to meet manufacturing objectives with emphasis on customer quality and customer service. Ensure proper coordination of daily operations through monitoring of performance measures and communication with plant management personnel. 

The position’s emphasis is to provide direct supervision and leadership of a continuous manufacturing operation (performance, quality, production efficiency, customers, and employee relations).

PRINCIPAL ACCOUNTABILITIES

• Directs forming, batch & furnace, process, selecting, carton assembly, materials management, quality and service, and plant engineering through plant manager.
• Works with appropriate plant management and engineering personnel to develop a plan for process improvement in the plant. Includes technological improvements, training to improve employee skills, and identifying opportunities to reduce costs.
• Reviews the performance of subordinates and holds them accountable for achieving plant goals.  Defines performance measures.
• Performs Advanced Quality System responsibilities in accordance with the AOQ manual to ensure performance to ISO Standards & corporate AOQ policy.
• Works with plant supervision to maintain good employee relations. Promotes and supports team building and employee empowerment. Ensures good plant communications.
• Responsible for Labor Relations in the plant; attends third-step grievance meetings as the Company representative and communicates the Company’s response. Maintain communication with the International Union representative. Ensures adherence to Labor Contract.
• Works with sales personnel and customers to maintain familiarity with customer operations. Informs sales personnel of production problems and provides support to quality and service functions. Make customer visits as necessary.
• Reviews operating reports, budgets, cost objective performance, product P&L’s, etc. Discusses performance and approve corrective action with subordinate department supervisors and affected department employees.
• Ensures timely & accurate production forecasting

Bachelor’s Degree or equivalent experience

8+ years manufacturing experience

 Glass plant experience highly preferred

Proven experience managing and leading others to change and improve technical processes.

Excellent communication and organizational skills

What O-I Offers:

Salary Range:  The expected salary range for this position is between $126,500 - $166,000 and includes a possible 15% quarterly incentive bonus.  Actual pay will be adjusted based upon candidate experience and other job-related factors permitted by law.

O-I offers a very generous benefit package – some of the highlights are: 

• Vacation time and paid holidays  
• Medical, dental, prescription and vision care coverage 
• Pre-tax accounts 
• Well-being program which includes opportunity to earn employer contributions 
• Life and AD&D Insurance 
• Disability Insurance 
• Retirement saving plans with employer contributions 
• Financial advisors to assist with retirement planning and financial wellness 
• Employee Assistance Program 

O-I is an Equal Opportunity and Affirmative Action Employer committed to building a diverse, equitable and inclusive culture. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, veteran status or other protected category. 

Qualified individuals with disabilities or disabled veterans who are unable or limited in their ability to apply on this site may request reasonable accommodations by emailing [email protected]. 

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