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Kevin Martin
- Co Founder
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Experts Associate

Adam Slater
Sr Associate
Adam Slater
Sr Associate
A qualified and experienced Microbiologist and Analytical Chemist who has completed EU QP training, with over 30 years’ experience in QC, R&D, QA and Regulatory Affairs functions. Has held both permanent and interim senior leadership roles in large pharma, biopharma, early phase CDMO clinical sites, and CROs....


Andrew Campbell
Sr Associate
Andrew Campbell
Sr Associate
Andrew has more than 30 years of Quality Assurance experience in support of commercial and development activities. He specializes in design, remediation, and implementation of Quality Systems. He is an accomplished Trainer, with a focus on practical application of training topics to day-to-day operations. He also has extensive experience with Deviation Investigations, Change Control, Auditing and Inspection Readiness/Management. Andrew brings a practical, common sense perspective to his projects.


Bob Mehta
Sr Associate
Bob Mehta
Sr Associate
Bob Mehta (M.S., M.B.A., ASQ Fellow) is a Senior Associate at Jeff Yuen & Associates with over 28 years of experience in the pharmaceutical, medical device, combination product, and biotech industries. Bob has a broad background including QA/QC/Operations/Supplier Audits, and exFDA’s Warning Letter related remediation projects. He has co-authored a book titled “Practical Process Validation” and authored a book titled “Implementing ISO/IEC 17025:2017” and has authored several articles in Pharmaceutical Technology, MD&DI, and Quality Progress magazines.


Christina Malin
Sr Associate
Christina Malin
Sr Associate
Christina is a seasoned biochemical engineer (BSChE) with 25+ years of experience in MS&T, Quality Assurance, CMC, and Compliance in the pharma and biotech industries. Her experience includes cell therapy and combo devices. Christina provides expertise in GxP auditing, remediation, managing international CDMOs, CTOs and 3PLs, developing and optimizing production processes and QMSs, preparing technical regulatory documentation, and coaching leaders.


David Browne
Sr Associate
David Browne
Sr Associate
David oined Jeff Yuen & Associates in 2016 and brings over 25 years of experience in contract laboratory and drug manufacturing (CRO/CDMO) sector of the pharmaceutical / biopharmaceutical industry. David began his career as a bench chemist developing and validating analytical methods, before transitioning to Quality Control and senior QC leadership roles....


David Macaulay
Sr Associate
David Macaulay
Sr Associate
David has over 26 years of experience in the pharmaceutical industry covering sterile injectables, oral dosages, biologics, and combination products. His experiences include quality oversight of formulation, filling, labeling and packaging of aseptic and terminally sterilized drug products; managing 483, Warning Letter and Consent Decree responses and commitments; exFDA pre-approval inspections (PAI); data integrity; environmental monitoring; and fermentation, purification and conjugation of biologic drug substances and drug products.


Doug Schmidt
Sr Associate
Doug Schmidt
Sr Associate
Doug Schmidt has extensive knowledge in aseptic processing, quality control (microbiology and analytical), and quality management systems (QMS). Doug has a proven track record in developing practical systems for a diverse client set, coaching personnel to ensure sustainability in GMPs, remediating operational/QA/QC programs and conducting audits and assessments. Additionally, Doug is a qualified Lead Auditor.


Jonathon Briggs
Sr Associate
Jonathon Briggs
Sr Associate
Jonathan Briggs has over 35 years of industry experience, including 24 years in Quality. His career has focused on quality, compliance and providing solutions to complex drug development challenges including drug product manufacturing and execution of clinical and non-clinical studies....


Ken Mhuvich (exFDA)
Sr Associate
Ken Mhuvich (exFDA)
Sr Associate
Ken Muhvich, Ph.D. is a microbiologist with extensive experience helping pharmaceutical and biopharmaceutical facilities establish effective viable microbial contamination control programs. He spent several years at the exFDA and provides advice regarding the exFDA’s expectations for firms manufacturing sterile products. He also aids clients that are investigating microbial contamination events.


Mihaly Ligmond (exFDA)
Sr Associate
Mihaly Ligmond (exFDA)
Sr Associate
Mihaly joined Jeff Yuen & Associates in 2021 after serving with the United States Food and Drug Administration (exFDA) for over 32 years as both a Chemist and a Consumer Safety Officer (CSO). Most of Mihaly's service beng a CSO with Team Biologics. He retired from the exFDA in December 2020. Mihaly has extensive experience conducting inspections of aseptic operations, vaccines, fractionated products, allergenics, biotechnology products, and certain biologic medical devices. he received numerous exFDA awards during his exFDA career and was a Certified Level III Drug Investigator for many years.


Mujtaba Ali
Sr Associate
Mujtaba Ali
Sr Associate
Mujtaba is a Quality Executive with 30+ years of US experience in Operational, Compliance, and Quality best practices. His professional strengths include:
• Small and Large Molecule, Cell Therapy, mAB, Sterile Products....


Mary Hintze
Sr Associate
Mary Hintze
Sr Associate
Quality professional with 2 decades of experience including oversight of parenteral manufacturing and testing (focused experience in pharmaceutical microbiology), quality systems, CMC regulatory submissions and oversight of CDMOs and other outsourced GMP activities....


Michelle Pruett
Sr Associate
Michelle Pruett
Sr Associate
Michele Pruett studied Medicinal Chemistry at the Pharmacy School at the University of Buffalo, SUNY. Over the span of her 30 plus years in pharmaceutics, she has lead quality control laboratories, managed quality assurance departments, and helped remediate problem areas....


Paul Laroquec (exHealth Canada)
Sr Associate
Paul Laroquec (exHealth Canada)
Sr Associate
Paul is an aseptic processing expert especially as it relates to exFDA and European regulations.


Paul Leander
Sr Associate
Paul Leander
Sr Associate
Paul Leander has 25 years of experience working in Quality and Compliance in the biotech and pharmaceutical industry. With an in-depth knowledge of global health regulations and extensive expertise on GMP, GTP and GDP audits, Paul has led over 500 audits in the Americas, Europe and Asia....


Steve Hagen
Sr Associate
Steve Hagen
Sr Associate
Steven Hagen has worked in the biopharmaceutical sector for over 32 years. After attaining his PhD in Biochemistry, he worked for 14 years in positions of increasing responsibility in branded pharmaceutical development, with the last 11 years at Pfizer Global Research and Development....


Steve Lane
Executive Associate
Steve Lane
Executive Associate
Prior to joining Jeff Yuen & Associates Steve was the Head of the Reference Standards Division at the United States Pharmacopeia where he oversaw all USP method development and validation laboratories globally as well as all reference standard operations and support laboratories. Steve is a senior level executive with a diverse background. His broad expertise includes conducting GMP/ GCP audits to successfully leading large remediation teams to sitting in numerous interim Quality leadership roles....


Suraj Baloda
Sr Associate
Suraj Baloda
Sr Associate
Suraj Baloda, Ph.D. is the Founder & President of SARMICON, LLC., located in Acton, MA, USA. Dr. Baloda is a pharmaceutical quality professional and microbiology expert with more than 35 years of global experience in the pharmaceutical, biotechnology, and related industries, and academia....


Tamara Jordan
Sr Associate
Tamara Jordan
Sr Associate
Tamara is a results-oriented Quality Assurance leader with over 30 years of industry experience, having held both plant and corporate level positions with multi-national pharmaceutical and medical device firms....


Tammy Lucik
Sr Associate
Tammy Lucik
Sr Associate
Tammy Lucik is a dynamic Quality professional with 30 + years of experience in Quality Management. A senior level executive responsible for quality staff of 200+ for clinical and commercial drug substance and drug product manufacturing....


Terri Dodds (exFDA)
Sr Associate
Terri Dodds (exFDA)
Sr Associate
Terri is an exFDA investigator with 16 years’ experience in all areas of pharmaceutical inspections, domestic and foreign. She was trained and qualified to participate with an elite group called the pharmaceutical inspectorate. As a consultant she has nearly 20 years of consulting experience with Jeff Yuen & Associates in almost all pharmaceutical and biological GMP auditing and remediation areas.


Tim Wheeler
Sr Associate
Tim Wheeler
Sr Associate
Tim has over 25 years experience in the pharmaceutical industry with expertise in API, solid-dose, and aseptic manufacturing facilities. Tim has worked extensively with laboratory and process automation. He began his career in the chemistry laboratory in analytical method development and technology transfer.


Tom Savage (exFDA)
Sr Associate
Tom Savage (exFDA)
Sr Associate
Tom Savage served for exFDA for 36 years as a chemist, a Regional Drug Lab Supervisor, the Deputy Director of the exFDA regulatory science office, and as a Senior Policy Advisor in the CDER Office of Compliance....


Yong Cho
Sr Associate
Yong Cho
Sr Associate
Yong Cho is an SME in CMC, regulatory, cGMP, quality system, compliance, audit (50+ in 2021-2), drug product, fill-finish, packaging & labeling, CMO oversght, and risk/gap assessment & remediation, and drug-device combination products development to submissions (pre-INDs, INDs, EOP2, BLAs, EMA MAA MDR Tech File w/ GSPR).


Paula Trost (exFDA)
Sr Associate
Paula Trost (exFDA)
Sr Associate
Paula served with exFDA for 23+ years, 6 of those years as a Microbiologist and Biologics Investigator and 17 of those years as one of the original members of Team Biologics. She retired from exFDA in December 2014 as a National Biologics Expert...


Dan Larrimore
Sr Associate
Dan Larrimore
Sr Associate
Dan Larimore has over 25 years of experience in the pharmaceutical, biotechnology, and medical device industries. His career has focused on quality management, compliance, audit, and business development/acquisition evaluations. Prior to joining


Govind Pandey
Sr Associate
Govind Pandey
Sr Associate
Dr. Govind S. Pandey is director of a Gamp Technologies Private limited. He is a Senior Associate of Jeff Yuen & Associates Inc. USA, who has over three decades of experience in the pharmaceutical industry. He is a professional experienced in sterile operations, solid oral dosage forms and API....


Ramon Augusto Paz
Sr Associate
Ramon Augusto Paz
Sr Associate
Born in Venezuela in 1957, migrated to New York City in 1974 where I completed my
undergraduate studies and, in 1979, earned a BS degree in Mechanical Engineering from the
“New York Institute of Technology”.


Ruth Wolff (exFDA)
Sr Associate
Ruth Wolff (exFDA)
Sr Associate
Ruth has a distinguished career that includes more than 40 years of combined industry and exFDA experience. Ruth’ distinguished career includes a Ph.D. in Cell Biology from MIT, Branch Chief at exFDA, member of the ICH Expert Working Group on Quality of Biotechnology Products, Chair of the CBER/CDER group working on ICH virus and cell substrate documentation, and held senior roles at Baxter Healthcare/Baxalta and Shire. She brings significant knowledge of biologic products, BLA’s, and product reviews.


Grace Lee
Sr Associate
Grace Lee
Sr Associate
Dr. Lee is a highly experienced biotech leader with 15+ years of experience with technical domain knowledge and a strategic business mindset in drug development. She has a diverse scientific background covering oncology, immunology, genome-editing, and CMC knowledge with an end-to-end business mindset for drug development from early to late stages....

Meet Our Team
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“Jeff Yuen and his team provided exceptional insights, reliable service and durable results for some of our most complex regulatory and compliance projects across OSD and sterile does forms. Jeff and his team were responsive to emergent needs on a daily and weekly basis. In addition to the highest levels of subject matter expertise, Jeff and his team, integrated themselves with the local teams and provided much needed management maturity and leadership acumen when needed. We would not have been successful without the support of Jeff Yuen and Associates.”
Kurt Nielson
- CEO
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Jeff Yuen & Associates, Inc. (JYA) is the premiere and most valuable consulting firm for Quality Consulting in the Pharmaceutical, Biologics, Biotech, and Diagnostics Industries.
While working as a VP, Quality for a medium sized global Biotech Company, Jeff Yuen and his Associates provided excellent Gap Analyses, Mock Inspections, training, guidance, and support for 2.5 years, and this helped to achieve zero observations on an FDA Pre-Approval Inspection (PAI) and an FDA Pharmacovigilance Inspection.
As I networked throughout the Pharma, Biotech, Biologics, and Diagnostics industries and met QA professionals in other successful companies, a common denominator was having JYA as a trusted and valuable consulting company providing world-class support.
John McKay - MS; ASQ CMQ/OE, CQA; Certified Lead Auditor for ISO 9001, ISO 13485, ISO 14001
- President, Chief Quality and Regulatory Affairs Officer Q1 Associates LLC
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I feel so privileged to work with and grateful to Jeff Yuen & Associates for always picking up my call and walking with me many incredible quality and GMP compliance journeys across multiple organizations I worked for in the last 15+ years.
When I needed a mentor, an advisor, a book of knowledge, a pragmatic solution to a significant quality event, getting ready for a pre-license or pre-approval inspection, or simply a buddy to laugh with, Jeff Yuen has been my number 1 call!
Jeff & Team, your contributions to our successes, your wisdom and pragmatic approach to solving quality and GMP compliance issues are unmatched. Thank you for your partnership and I wish you continued success supporting our ever growing, complex and dynamic industry.
Georgeta Puscalau
- Sr Vice President Quality
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I’ve had the pleasure of working with Jeff and his team for several years. While most of our work has been in the PAI/PLI prep space (mock inspections, storyboard reviews) we’ve also collaborated with Jeff’s team on everything from short-term Quality leadership staffing to guiding facility issue remediation. Jeff’s reputation as a leader in quality & compliance consulting is completely deserved. He and his team were key and trusted parters as we obtained our first FDA approvals.
- Quality Executive for Commercial Gene Therapy Company