Process Development Scientist I (Downstream)

Company: Actalent
Location: Saint Louis
Posted on: February 20, 2026

Job Description:

Job Description Job Description Job Title: Process Development Scientist I (Downstream) Job Description This position offers an opportunity to join a dedicated team of Process Development Scientists. You will contribute to the development, confirmation, and transfer of downstream protein purification processes for manufacturing, playing a crucial role in global operations. Collaborating with customers, scientists, and various departments, you will implement advanced solutions in high-quality biopharmaceutical facilities. Responsibilities Perform laboratory experiments to develop, assess, or transfer protein purification processes. Gain experience using industry-standard technology such as chromatography, filtration, and UFDF. Interpret client documents and literature to strategize successful process development and transfer activities. Communicate findings and discuss data relevance with a multidisciplinary team including upstream, downstream, and analytical scientists, quality assurance, process engineers, and customers. Essential Skills Protein purification Chromatography Biochemistry Additional Skills & Qualifications Bachelor or Master of Science degree in Biology, Chemistry, Biochemistry, Chemical Engineering, or a related field. 1 - 2 years of relevant lab experience. Ability to function in a constantly evolving environment. High attention to detail and adherence to standard procedures. Strong desire to learn new skills. Ability to work independently with excellent communication and prioritization skills. Work Environment The work schedule is Monday through Friday, 9 AM to 5 PM. The role requires the ability to stand for extended periods and perform repetitive hand motions, as well as lift when necessary. Job Type & Location This is a Contract to Hire position based out of Saint Louis, MO. Pay and Benefits The pay range for this position is $32.00 - $32.00/hr. Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include the following: • Medical, dental & vision • Critical Illness, Accident, and Hospital • 401(k) Retirement Plan – Pre-tax and Roth post-tax contributions available • Life Insurance (Voluntary Life & AD&D for the employee and dependents) • Short and long-term disability • Health Spending Account (HSA) • Transportation benefits • Employee Assistance Program • Time Off/Leave (PTO, Vacation or Sick Leave) Workplace Type This is a fully onsite position in Saint Louis,MO. Application Deadline This position is anticipated to close on Feb 28, 2026. About Actalent Actalent is a global leader in engineering and sciences services and talent solutions. We help visionary companies advance their engineering and science initiatives through access to specialized experts who drive scale, innovation and speed to market. With a network of almost 30,000 consultants and more than 4,500 clients across the U.S., Canada, Asia and Europe, Actalent serves many of the Fortune 500. The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law. If you would like to request a reasonable accommodation, such as the modification or adjustment of the job application process or interviewing due to a disability, please email actalentaccommodation@actalentservices.com for other accommodation options.

Keywords: Actalent, O'Fallon , Process Development Scientist I (Downstream), Science, Research & Development , Saint Louis, Missouri