Chemical Process Engineer

Chemical Process Engineer

Chemical Process Engineer Kelly® Science & Clinical is seeking a Chemical Process Engineer for a contract position at a cutting-edge client in the pharmaceutical/API manufacturing industry in St Louis, MO. If you're passionate about bringing the latest scientific discoveries to life and are ready to take the next step in your career, trust The Experts at Hiring Experts.

Pay: $45-55/hour

Schedule:

Mon-Fri On-site | Full-Time | Occasional travel to customer sites expected

Overview Our client is an industry-leading company at the forefront of GMP Active Pharmaceutical Ingredient (API) manufacturing. They specialize in translating bench-scale chemistry into robust, commercial-ready processes — operating across kilo lab, pilot, and commercial scales to deliver high-quality small-molecule APIs that meet the most rigorous regulatory standards. In this role, you will be responsible for bridging the gap between R&D and full-scale manufacturing.

You will translate bench chemistry into plant-ready processes, optimize yield and quality, and support technology transfers across all scales of production. You'll collaborate cross-functionally with R&D, Analytical, QA/QC, Supply Chain, and external customers to ensure timelines and critical quality attributes are met — all within a cGMP-compliant environment.

• Scale-up & Tech Transfer:
  Convert lab procedures into scalable unit operations including reaction, crystallization, filtration, and drying; author and execute transfer packages and PPQ protocols
• Validation & Compliance:
  Lead and author process validation documentation, batch records, and change controls; investigate deviations and out-of-specification (OOS) results and drive CAPA resolution
• Cross-Functional Collaboration:
  
  Partner closely with R&D/Analytical, QA/QC, Supply Chain, and external customers to meet project timelines and ensure Critical Quality Attributes (CQAs) and Critical Process Parameters (CPPs) are achieved
• Documentation:
  Write SOPs, technical reports, and summaries suitable for regulatory inspections and internal governance

• Education:
  
  BS in Chemistry, Chemical Engineering, or a related discipline
• Experience:
  
  3–7 years of experience in GMP small-molecule API manufacturing and/or process scale-up
• Technical
  
  Skills:
  
  Demonstrated bench chemistry background with a strong understanding of reaction mechanisms, impurity control, and crystallization science — including chemical mass balance, reaction outcome prediction, and scenario-based problem solving
• Regulatory Knowledge:
  Solid grasp of cGMP standards, data integrity requirements, and regulatory expectations; strong technical writing ability