Your Resource For Cannabis Chemistry


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About Us

Our Team is a select group of experienced chemists and professionals that hold themselves and others to the highest quality and scientific standards. 

Pacific Star Labs takes pride in only hiring the most competent team members, providing first-class training, and professional development opportunities.


Our Lab

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designed specifically to meet the rigorous testing requirements for cannabis in California. The lab is equipped with brand-new, top-of-line Shimadzu instrumentation. Our processes are optimized with a highly efficient workflow and superior quality control system. Combining these attributes with an exceptional, highly experienced staff enables us to deliver a best-in-class overall experience to our select group of partners.

Our Team of Experts

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David Winternheimer, PhD, PPM

General Manager

David has founded and advised more than 8 start-ups over the past decade in business development leadership positions, enabling many of them to achieve profitability and/or exit opportunities in their first years of operation. In addition to deep experience in sales/marketing, he also provides technical expertise to the team. David received his PhD in organic chemistry from UCLA and his Postdoctoral Professional Masters in Bioscience Management (PPM) from the Keck Graduate Institute of Applied Life Sciences.

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Tommie Griffin

Lab Director

Tommie received his BS in chemistry from Humboldt State University and began his career as a chemist in biotechnology. He then made the move into the cannabis industry in its early infancy years. Over the past four years, Tommie has developed and validated test methodologies required by state regulations. He aims to provide a great customer experience, lead a highly skilled team and deliver clean cannabis to our community.

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Devin Valdez, BS


Devin has over three years of research experience in fermentation kinetics and cancer biomarker discovery where he created genetic algorithms and was on the prototype team for a cancer discovery device. As an Analyst, Devin processes samples, analyzes results, and assists in implementing the latest laboratory innovations. He received his B.S. in Chemistry from Cal Poly - San Luis Obispo.

Ajay Mistry


Ajay Mistry, BS

Operations Manager

With over 5 years of small business background, Ajay supports the team in a multitude of ways. From assisting with laboratory work to customer service, Ajay helps oversee and coordinate efforts between all departments. He strives to provide exceptional customer service and has an exceptional passion for this industry.

Linda Chan


Linda Chan, BS


Linda has over two years of experience in research using aseptic cell culture techniques for MTT assays and glutathione quantification with a background in cancer metabolism. As a lab technician, she prepares samples for analysis, optimizes workflow, and identifies bottlenecks in sample preparation. Linda received her BS in Chemistry from CSUN.

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Carolina Cardenas, BS


Carolina Cardenas graduated from the University of La Verne with a BS in Chemistry. As a lab analyst, she's passionate about cannabis science and mycology.

Kat Wilson


Kat Wilson

General Administration

Kat is an experienced administrator and office manager, helping several new companies establish themselves over the past decade. Kat supports all departments across the organization to ensure the company operates at optimal efficiency at all times.


We are always looking to add new talent to our growing team. Learn about open positions. 

Career Opportunities