Assembly Supervisor in St. Peters, Missouri at Cosmos Corporation

At Cosmos Corporation, we make health and wellness products that help people and pets live better lives. From our O’Fallon, Missouri headquarters, we manufacture high-quality, natural liquid products with ingredients people trust!

The Assembly Supervisor is responsible for overseeing daily production operations and leading a team of Assembly operators to ensure efficient workflow. This role focuses on streamlining processes to improve productivity while maintaining high-quality standards. The Assembly supervisor monitors performance, addresses production challenges, and ensures that output targets are consistently met. Additionally, this position promotes a safe work environment and supports continuous improvement initiatives across the Assembly department.

• Oversee daily assembly line operations, including managing Leads and Assembly Operators, assigning tasks based on production schedules, and ensuring all tools, equipment, and materials are available and functioning properly.
• Support onboarding, training, coaching, and performance evaluation of Assembly Leads and Operators, providing clear and constructive feedback to improve accuracy, efficiency, and overall team performance.
• Build strong team relationships through consistent communication, regular stand-up meetings, and real-time feedback on assembly progress, production issues, and workflow updates.
• Promote a positive, safety-focused, and quality-driven work environment that aligns with company values while encouraging accountability, teamwork, and engagement.
• Drive continuous improvement across assembly processes by identifying inefficiencies, reducing waste, and implementing lean manufacturing practices to optimize line performance.
• Manage assembly-stage inventory, including components, subassemblies, and finished goods, ensuring accurate tracking and alignment with production requirements.
• Ensure strict adherence to Assembly Standard Operating Procedures (SOPs) and Work Instructions (WI), coordinate equipment maintenance, and adjust assembly processes as needed to maintain product quality and throughput.
• Maintain and expand technical knowledge of assembly processes, tools, and equipment through ongoing training, industry best practices, and professional development opportunities.

Regular attendance is required. This is a safety-sensitive position and should not be under the influence of any substance.

• High school diploma or general education degree (GED) required; HACCP certification preferred.
• 3–5 years of experience in a manufacturing or assembly production environment.
• Prior experience in a supervisory or leadership role within a production setting (e.g., Supervisor, Lead, or Team Lead).
• Demonstrated ability to lead teams, manage workflows, and meet production targets in a fast-paced environment.
• Working knowledge of manufacturing processes, quality standards, and safety regulations.
• Experience with continuous improvement practices (e.g., Lean manufacturing) preferred.

Competencies

• Leadership & Team Development.
• Production & Process Management.
• Continuous Improvement Mindset.
• Quality & Safety Focus.
• Communication & Problem-Solving.

Physical Requirements

The physical demands described here are representative of those that must be met by an employee to successfully perform the essential functions of this job.

Standing and walking for 100% of the shift, walk upstairs and climb up ladders and walk throughout the facility. Use hands and fingers to handle or feel objects, tools, or controls. The employee frequently reaches with hands and arms, including overhead; stoops, bends, kneels, and crouches; and must be able to communicate clearly.

The employee must regularly push, or pull, lift, carry, materials and products weighing up to 60 pounds throughout the day, including lifting items overhead. Work is performed in a manufacturing environment with exposure to varying and sometimes uncontrolled temperature conditions that are hot, humid and cold, as well as moderate noise levels and moving mechanical parts.

Specific vision abilities required include close vision, distance vision, color vision, peripheral vision, depth perception, and the ability to adjust focus.

Benefits & Culture

• Paid vacation, sick leave, and Five Mission Days.
• Comprehensive medical, dental, and vision group insurance.
• 401(k) contribution.
• Development programs.
• A positive, purpose-driven culture where people truly care about one another.

Cosmos is a company that supports and invests in its employees. We have a healthy workplace culture guided by a clear vision, mission, promise, and values! Our culture is intentionally fostered daily by how employees live out our values. The result is a place where employees genuinely enjoy coming to work every day!

Equal Opportunity Employer

Cosmos Corporation is an equal-opportunity employer. We prohibit discrimination and harassment of any kind. Cosmos Corporation makes hiring decisions based solely on qualifications, merit, and business needs at the time.