Senior Microbiologist

Clarke

$95K — $120K *
Pharmaceuticals & Biotech
5 - 7 years of experience
Job Overview by Ladders

Qualifications

  • M.Sc. in Microbiology or related field with 5+ years of industry experience, or B.Sc. with 8+ years; PhD strongly preferred.
  • Proficient in aseptic techniques, including cell counting, streak plating, and interpreting optical density readings.
  • Hands-on expertise in bioreactor operations and downstream process optimization.
  • Ability to work independently and adapt based on observations.
  • Strong data collection, interpretation, report writing, and presentation skills.
  • Effective verbal and written communication skills in English.
  • Willingness to travel up to 20% at short notice.

Responsibilities

  • Lead daily lab operations ensuring compliance with quality and safety standards.
  • Serve as subject matter expert for microbial active ingredients and Bacillus technologies.
  • Lead biological ingredient programs from evaluation to commercialization, including regulatory support.
  • Develop and optimize cultivation and fermentation processes for manufacturing readiness.
  • Maintain microbial cultures and troubleshoot challenges through root cause analysis.
  • Collaborate with cross-functional teams to support innovation and product development.
  • Develop testing methods, validation protocols, and quality control systems.

Benefits

  • Comprehensive medical, dental, and vision coverage.
  • 401k plan with generous matching.
  • Tuition reimbursement and career development training opportunities.
  • LinkedIn Learning subscriptions.
  • Paid parental leave and volunteer time.
  • Generous PTO and holiday offerings, including a winter break.
  • Discretionary bonuses and electric vehicle incentives.
Full Job Description
Senior Microbiologist

This is an exciting opportunity for a highly motivated professional who is committed to scientific integrity, continuous improvement, and making a measurable impact.

Key Responsibilities
  • Lead daily microbiology lab operations, ensuring efficient workflow and compliance with quality and safety standards.
  • Serve as the SME for microbial active ingredients and Bacillus-based technologies, providing scientific and technical guidance.
  • Lead biological active ingredient programs from evaluation through commercialization, including scale-up and regulatory support.
  • Develop and optimize microbial cultivation and fermentation processes to improve yield, scalability, and readiness for manufacturing.
  • Maintain microbial culture collections and troubleshoot microbiological challenges through root cause analysis.
  • Collaborate with Quality, Manufacturing, Regulatory, and Product Development teams to support innovation and commercialization.
  • Develop microbiological testing methods, validation protocols, and quality control systems to support compliance and product integrity.
  • Provide project leadership, manage priorities and resources, and communicate progress to leadership.
  • Mentor microbiologists and lab personnel through coaching, training, and technical guidance.
  • Conduct research, literature reviews, and patent searches to identify emerging technologies and actionable recommendations.
  • Prepare and present technical documentation, reports, protocols, and research findings.
  • Ensure compliance with ISO, GLP, and regulatory requirements while promoting safety, innovation, and continuous improvement.

Hours: Monday - Friday, 8am - 5pm

Location: St Charles, IL

Candidates should be located in reasonable proximity to St. Charles, IL. Relocation assistance will not be provided.

Top Qualifications
  • Sc. in Microbiology, biotechnology or related field with 5+ years of relevant experience, OR B.Sc. with 8+ years of relevant experience in a reputable industry. PhD is strongly preferred.
  • Demonstrate proficiency in aseptic techniques, including hands-on experience with tasks such as cell counting, streak plating, analyzing bacterial media characteristics & interpreting optical density readings.
  • Possess hands-on expertise in bioreactor operations, encompassing a comprehensive understanding of various bioreactor components, proficiency in bio command software utilization, and a preference for experience in downstream process optimization, as well as the isolation or purification of the product of interest.
  • Ability to work independently, think critically, and adapt based on observations and learning.
  • Computer proficiency and aptitude related to data collection and interpretation, report writing and presentation.
  • Ability to communicate effectively in English in both verbal and written form.
  • Ability to travel for short periods and at last-minute notice (up to 20%).

This is an exempt salary position and the hiring range for this position is expected to be $95,000-$120,000. This range reflects an anticipated range for this position. The salary range offered may depend on a variety of factors, including the qualifications of the individual applicant for the position, years of relevant experience, specific and unique skills, level of education attained, and certifications or other professional licenses held.

BENEFITS

We offer an outstanding compensation and benefits package including medical, dental, vision, life, disability, 401k (Roth and traditional) with a generous match, tuition reimbursement and career development and training opportunities, LinkedIn Learning subscriptions, paid parental leave program, electric vehicle incentives, paid volunteer time, generous PTO, paid holidays, paid winter break between Christmas and New Years, and discretionary bonus.

If you are excited about what you've read and feel that you are right for this role, please submit your resume and relevant information.

Be sure to check out our website ( ) to learn more about how Clarke is helping to make the world more livable, safe & comfortable.

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