
Polymer Materials Scientist (Must have rubber or silicone experience) Jobot
- $115,000–$135,000 Per Year
· Develop, modify, and optimize formulations for skincare, color cosmetics, suncare, hair care, body care, personal care, and applicable OTC products.
· Translate customer and marketing briefs into prototypes by selecting appropriate actives, emulsifiers, surfactants, rheology modifiers, preservatives, and sensory-enhancing ingredients.
· Design and evaluate stability, compatibility, preservative-efficacy, microbiological, physical, and analytical testing; interpret results and reformulate as needed.
· Support OTC monograph alignment, active-ingredient controls, Drug Facts and claims documentation, cGMP batch records, in-process controls, and product specifications in coordination with Regulatory Affairs and Quality.
· Scale formulas from laboratory bench to pilot and full production; prepare manufacturing instructions and troubleshoot process, equipment, yield, viscosity, color, stability, and filling issues.
· Evaluate raw materials and supplier technical documentation, including technical data sheets, COAs, safety information, INCI nomenclature, and ingredient restrictions.
· Investigate complaints, stability failures, out-of-specification results, and quality deviations, and recommend technically supported corrective or preventive actions.
· Use and improve Physical AI-enabled tools and the company’s PMS Process to strengthen experimentation, data capture, formulation iteration, technical knowledge retention, and development speed.
· Maintain accurate formulas, laboratory notebooks, batch sheets, specifications, SOPs, test summaries, and technical transfer records in accordance with GLP and internal documentation standards.
| Location | Corona, CA |
| Job Type | Full-time |
| Company Size | 11 - 50 |
| Headquarters | Corona, CA, US |
| Website | https://www.ctkotc.com |
· Bachelor’s degree in Biology, Biochemistry, Pharmaceutical Science, or Cosmetic Science.
· At least two (2) years of full-time professional experience in the medical, pharmaceutical, or cosmetics sector involving regulated documentation, compliance coordination, technical operations, laboratory/R&D support, or product-development support.
· Working knowledge of cosmetic or OTC formulation principles, stability and compatibility evaluation, preservation, and controlled technical documentation.
Preferred Qualifications
· Hands-on experience with emulsions, surfactant systems, rheology modification, preservatives, pH/viscosity testing, particle-size evaluation, or cosmetic product scale-up.
· Familiarity with FDA OTC monographs or Monograph Orders, Drug Facts requirements, cGMP documentation, MoCRA, INCI nomenclature, or global cosmetic ingredient requirements.
· Experience with laboratory instrumentation, structured experimental data systems, AI-enabled development tools, or formulation knowledge-management processes.
· Ability to interpret technical data sheets, certificates of analysis, safety documentation, specifications, and laboratory or analytical results.
· Strong data-analysis, technical-writing, organization, and cross-functional communication skills.
· Korean- English bilingual
CTK OTC Laboratories is a Southern California-based contract development and manufacturing company specializing in customized skincare, color cosmetics, suncare, personal care, and OTC products. Our Corona facility supports formulation development, pilot testing, manufacturing, filling, packaging, quality assurance, and regulatory documentation for emerging and global beauty brands.

