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About the Role
Long Island Labs is seeking a Probiotic Microbiologist to lead molecular and cellular testing of probiotic products. This role designs and runs PCR/qPCR assays, extracts DNA from complex matrices, and uses flow cytometry to identify, quantify, and characterize probiotic strains. The successful candidate will own specialized probiotic testing protocols and translate complex data into clear, defensible results for clients and internal teams.
Responsibilities
- Design, optimize, validate, and execute PCR and qPCR assays for microbial identification and quantification.
- Perform high-yield, high-purity DNA extraction from complex biological matrices.
- Use flow cytometry for cellular analysis, live/dead viability testing, and population characterization.
- Lead specialized probiotic testing protocols, including strain identification, stability testing, and efficacy evaluation.
- Support label-claim verification by correlating molecular, cytometric, and plate-count results.
- Analyze complex datasets, troubleshoot assay performance, and draw defensible conclusions.
- Maintain rigorous, contemporaneous documentation of methods, raw data, and results.
- Present findings to cross-functional teams and clients through written reports and verbal briefings.
- Ensure all laboratory operations comply with standard operating procedures (SOPs), quality control guidelines, and the lab's ISO/IEC 17025 quality system.
- Author and revise SOPs and support method validation, internal audits, and corrective actions.
- Follow laboratory safety, biosafety, and waste-handling requirements.
Requirements
- Ph.D. in Biology, Microbiology, Molecular Biology, or a closely related field strongly preferred.
- M.S. with extensive industry experience will also be considered.
- Proven hands-on expertise in PCR, qPCR, DNA extraction, and flow cytometry.
- Direct background in probiotic testing, microbiome research, or microbial strain characterization preferred.
- Experience working in an ISO/IEC 17025-accredited or other regulated testing laboratory preferred.
- Strong ability to interpret complex biological data and troubleshoot assay development.
- Excellent written and verbal communication skills for reporting and collaborative research.
- Work is performed primarily in a laboratory environment with exposure to biological materials (BSL-1/BSL-2), chemical reagents, and laboratory equipment.
- Must wear required personal protective equipment (PPE) and follow all biosafety and chemical hygiene procedures.
- Ability to stand or sit for extended periods, perform repetitive fine-motor tasks (e.g., pipetting), and lift up to 25 lbs.
- Occasional extended or off-hours work may be required to meet stability-study timepoints or client deadlines.
Skills
- PCR
- qPCR
- DNA extraction
- Flow cytometry
- Probiotic testing
- Microbiome research
- Microbial strain characterization
- ISO/IEC 17025
- Data analysis
- Troubleshooting
- Written communication
- Verbal communication
Location
- Long Island
Work Type
- Laboratory environment
Experience Level
- Extensive industry experience (for MS candidates)
Education Level
- Ph.D.
- M.S.
Benefits
- 401(k)
- Health insurance
- Paid time off
About the Company
- Long Island Labs is seeking a Probiotic Microbiologist to lead molecular and cellular testing of probiotic products.
Equal Opportunity
- Long Island Labs, LLC is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, creed, sex, sexual orientation, gender identity or expression, national origin, age, disability, genetic information, marital or familial status, veteran status, or any other characteristic protected by federal, New York State, or local law. Reasonable accommodations are available to qualified individuals with disabilities upon request.