Glass Manufacturing Plant - Assistant Plant Manager

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.

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 responsible for planning, directing, and coordinating manufacturing operations within a continuous glass manufacturing environment. This role provides direct leadership across plant operations with a strong focus on safety, quality, customer service, productivity, and cost control, while driving continuous improvement and developing high‑performing teams.

Serving as a technical leader and glass manufacturing expert, the Assistant Plant Manager supports furnace operations and ensures performance against key plant objectives.

• Lead and coordinate daily manufacturing operations, including batch & furnace, forming, process, selecting, carton assembly, materials management, quality, service, and plant engineering.
• Drive continuous improvement initiatives to improve safety, quality, production efficiency, and cost.
• Lead furnace operations to achieve KPIs for Safety, Quality, Productivity, Flexibility, and Cost.
• Provide technical leadership in glass manufacturing processes, including high‑temperature continuous operations.
• Ensure compliance with AOQ/ISO quality systems, OSHA regulations, environmental standards, and company policies.
• Analyze operating data and performance trends to identify improvement opportunities.
• Develop and support production planning, forecasting, and cost management.
• Lead, coach, and hold teams accountable to performance goals; promote strong employee relations and engagement.
• Support customer quality and service requirements through coordination with sales and customer visits as needed.
• Manage labor relations responsibilities and ensure adherence to labor agreements.

• Bachelor's degree or equivalent experience.
• 8+ years of manufacturing experience, with glass manufacturing experience strongly preferred.
• Proven leadership experience managing teams in a continuous manufacturing environment.
• Strong analytical, communication, and organizational skills.
• Experience leading technical process improvements and responding to operational challenges.

What O-I Offers:

• 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.

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 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