Microbiologist, EPA Compliance

Exton PA, Direct Hire Salary: $78,000-$92,000/year

We are seeking an experienced Microbiologist to support laboratory testing and product development activities related to EPA-regulated disinfectants, sanitizers, and antimicrobial products. The successful candidate will perform microbiological efficacy testing in accordance with EPA guidelines and established industry standards, maintain compliance with GLP requirements, analyze data, and prepare technical documentation for regulatory submissions.

This position requires hands‑on experience conducting disinfectant efficacy studies, microbial culturing, aseptic laboratory techniques, and interpretation of test results in a regulated laboratory environment.

• Perform EPA disinfectant and sanitizer efficacy testing following established protocols and regulatory requirements.
• Conduct antimicrobial efficacy studies using methods including:
  • AOAC Use-Dilution Method
  • Germicidal Spray Products Test
  • Hard Surface Carrier Tests
  • Quantitative Carrier Tests
  • Bactericidal, fungicidal, and sporicidal efficacy studies
• Prepare microbial cultures, inocula, media, and reagents required for testing.
• Execute laboratory studies in compliance with Good Laboratory Practices (GLP), SOPs, and quality system requirements.
• Maintain accurate laboratory notebooks, raw data, and electronic records.
• Analyze microbiological data and prepare technical reports for clients and regulatory submissions.
• Operate, calibrate, and maintain laboratory equipment including incubators, biosafety cabinets, autoclaves, and colony counters.
• Participate in method development, validation, and troubleshooting activities.
• Support EPA registration requirements by generating scientifically sound efficacy data.
• Assist with laboratory investigations, deviations, CAPAs, and quality audits.
• Ensure adherence to laboratory safety procedures and biosafety practices.

• Bachelor’s degree in Microbiology, Biology, Biotechnology, or related life science field.
• Minimum 3 years of microbiology laboratory experience.
• Minimum 2 years of direct experience performing EPA disinfectant efficacy testing (AOAC Testing)
  • Experience with AOAC International test methods and ASTM antimicrobial testing standards.
• Strong knowledge of microbiological techniques, sterile procedures, and culture maintenance.
• Experience working under GLP and quality management systems.
• Proficiency in data analysis and technical report writing.
• Strong organizational skills and attention to detail.
• Excellent written and verbal communication skills.

• Experience supporting EPA registration studies.
• Experience testing disinfectants, sanitizers, sporicides, and antimicrobial preservatives.
• Knowledge of EPA FIFRA regulatory requirements.
• Experience working in a contract research organization (CRO), industrial microbiology laboratory, or disinfectant manufacturer.

• Microbial culturing and identification
• Aseptic technique
• Bacterial, fungal, viral, and spore testing
• GLP documentation
• SOP development and revision
• Laboratory equipment qualification and calibration
• Regulatory compliance and audit readiness