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Process Technician (Semco)

Semco
Saint Louis, MO Full Time
POSTED ON 6/20/2026
AVAILABLE BEFORE 10/17/2026

Company Overview

Tank Holding Corporation has become the market leader and manufacturer of rotationally molded poly and welded steel bulk storage and material handling products in North America. Tank is growing rapidly and is always working to expand its capabilities and diversify product offerings consistent with the company values of growth and service to its customers.

Job Summary

We’re looking for a Blow and Injection Molding Process Technician to join the Semco Tank Holding team in St Louis, MO! A Process Technician oversees production to ensure consistent quality products and maintains blow molding machinery to produce plastic products. Key responsibilities include adjusting process parameters (temperature, pressure), troubleshooting equipment, and ensuring product quality.

What We Offer:

  • Medical, dental, & vision insurance with competitive premiums
  • 401(k) with 3% matching
  • Up to $5,250 of educational assistance per calendar year
  • PTO 9 paid company holidays

Key Responsibilities

  • Setup and Operation: Trouble shoot and calibrate molds, adjust machine settings (temperature, pressure, cycle time), and operate machinery to meet production goals.
  • Maintenance & Repair: Troubleshoot and make minor repairs to machinery to minimize downtime.
  • Quality Control: Monitor production, inspect, and weigh finished products to ensure they meet specifications.
  • Changeovers: Efficiently change equipment settings for different product lines.
  • Safety & Environment: Maintain a safe, clean work area, and train operators on safe, proper machine handling.

Required Skills and Qualifications

  • Experience: Previous experience in plastics blow molding of 3-5 years, particularly with machines like Milacron, Graham.
  • Technical Knowledge: Strong mechanical aptitude, understanding of hydraulic, pneumatic, and electrical systems.
  • Physical Stamina: Ability to lift heavy molds and work in a manufacturing environment.
  • Problem-Solving: Strong troubleshooting skills to identify root causes of, for example, flashing or improper molding.


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. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions.


Occasional, represents 1 to 33% or 1-2 hours of an 8-hour work day.

Frequently, represents 34 to 66% or 2 1/2 to 5 1/2 hours of an 8-hour work day.

Regularly, represents 67 to 100% or 6 to 8 hours of an 8-hour work day.


While performing the duties of this Job, the employee is regularly required to stand; walk; use hands to finger, handle, or feel; reach with hands and arms and talk or hear.

The employee is occasionally required to climb or balance and stoop, kneel, crouch, or crawl. The employee must regularly lift and /or move up to 50 pounds. Specific vision abilities required by this job include close vision, color vision and peripheral vision.


Work Environment:

The work environment characteristics described here are representative of those an employee encounters while performing the essential functions of this job. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions.

While performing the duties of this Job, the employee is occasionally exposed to wet and/or humid conditions and moving mechanical parts.


AAP/EEO Statement:

Tank Holding provides equal employment opportunities (EEO) to all employees and applicants for employment without regard to race, creed, ancestry, sexual or affectional orientation, marital or veteran status, color, religion, sex, national origin, age, disability, genetics, status with regard to public assistance or any characteristic protected under federal, state or local law.


Other Duties:

Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities that are required of the employee for this job. Duties, responsibilities and activities may change at any time with or without notice.

Salary : $23 - $35

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