Manufacturing Operations Manager Jobs in Eldon, MO

Lief Labs is a premier formulation and product development innovator and manufacturer of dietary supplements. Our in-house product development and R&D team create the best-tasting and cutting-edge supplement formulations. Lief also houses a state-of-the-art, full-service current good manufacturing practice (cGMP) manufacturing facility, which offers custom solutions for many supplement categories. Lief collaborates with entrepreneurial firms to help them build premier brands. Our turnkey solutions allow us to engage in seamless partnerships that help brands with scalability and sustainable growth. Lief Labs is in the Santa Clarita Valley (Valencia, CA.)

Lead. Improve. Deliver.

We’re seeking a hands‑on Operations Supervisor 2 nd shift to lead production in a cGMP-regulated manufacturing environment. This role is ideal for a leader who thrives on driving operational excellence, building strong teams, and ensuring compliance with quality and safety standards. This role report to the Manager of Operations and has oversight for 20-25 regular full-time and temporary employees.

• Lead daily production operations to meet Safety, Quality, Delivery, and Cost (SQDC) KPIs
• Ensure strict adherence to cGMP, OSHA, and EPA regulations
• Drive root cause analysis and CAPA investigations to resolve deviations and improve performance
• Champion Lean Manufacturing, Kaizen, and continuous improvement initiatives
• Develop and execute cross‑training and workforce development plans
• Partner cross‑functionally (Quality, Maintenance, Planning) to resolve production challenges
• Support change management efforts in a regulated environment
• Lead, coach, and develop high‑performing production teams
• Foster a culture of accountability, engagement, and compliance
• Manage performance, employee relations, and workforce planning

• 3+ years of experience in manufacturing or operations leadership (GMP preferred)
• 3+ years of experience in a supervisory role within a fast‑paced GMP‑regulated environment
• Working knowledge of cGMP standards and regulated environments
• Experience with Lean / Six Sigma / continuous improvement methods
• Strong problem‑solving skills using data and root cause analysis
• Familiarity with ERP systems (SAP preferred)
• Advanced skills in Excel and reporting tools
• Bilingual English/Spanish is a plus

• Be a key leader in a quality‑driven, regulated manufacturing environment
• Opportunity to make a measurable impact on product quality and operational performance
• Grow your leadership skills while driving meaningful change

The role will be performed in a Good Manufacturing Practice (GMP) manufacturing environment, where products are produced under strict regulatory and quality standards to ensure safety, consistency, and compliance. This environment includes controlled cleanroom facilities, documented processes, and adherence to FDA 21 CFR Part 211 requirements. Employees must follow all GMP procedures, maintain a clean and organized workspace, and participate in quality assurance activities.

The offices are clean, orderly, properly lit and ventilated. Noise levels are considered low to moderate. Field conditions vary. Exposed to various raw materials, including allergens (i.e. milk, eggs, fish, shellfish, tree nuts, peanuts, wheat, soy).

While performing the duties of this job, the employee may regularly need to talk, hear and grasp items. This position is active and requires standing, walking, bending, kneeling, stooping, crouching, crawling, and climbing all day.

Regularly exposed to moving mechanical parts, strong fumes, loud noises, and occasionally extreme temperatures.

The employee must frequently grasp, lift and/or move items 10 pounds and occasionally grasp, lift and/or move items 33lbs.

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

• The salary range for this position is $80,000 - $95,000 USD. Starting pay for the successful applicant depends on a variety of job-related factors, including but not limited to market demands, experience, training, skills, and education. The benefits available for this position include medical, dental, vision, 401(k) plan, life insurance coverage, wellness benefits, education reimbursement program, and PTO.

Lief is an Equal Opportunity employer. All qualified applicants will receive consideration for employment regardless of race, color, religion, or sex, including sexual orientation and gender identity, national origin, disability, protected Veteran Status, or any other characteristic protected by applicable federal, state, or local law.

Suppose you are a qualified individual with a disability or a disabled veteran. In that case, you have the right to request accommodation if you are unable or limited in your ability to use or access our career center due to your disability. To request an accommodation, contact the Lief Human Resources department.

Lief will consider employment-qualified applicants with criminal histories in a manner consistent with the requirements of the Los Angeles Fair Chance Initiative for Hiring.

Lief uses E-Verify to confirm work eligibility in the United States. E-Verify compares the information on your Form I-9, Employment Eligibility Verification, to official government records.