About Us

S&G Labs is a locally owned and operated toxicology and Covid testing lab

S&G Labs Is Here For You

S&G Labs Hawaii, LLC was founded by Lynn Welch, MD who has been practicing and treating patients on the Big Island since 2008.

As a practicing pain physician, Dr. Welch understands the huge need for high-level expert care for patients treated with pain medications.

Dr. Welch has partnered with worldwide expert, Dr. Alan Wu, a Clinical Chemist & Toxicologist to bring the best, most precise lab testing to Hawaii.

S&G Laboratories has advanced the science of medication monitoring with cutting edge technology and drug detection services.

Our goal is to provide clinicians with resources and critical assessment tools to create personalized treatment plans while reducing healthcare costs.

Keeping all the business in Hawaii saves time and money by eliminating shipping costs and transportation time.

S&G Labs Timeline


September 2021

S&G Labs opens an office in Honolulu

August 2021

S&G Labs becomes a Safe Travel partner for the State of Hawaii

June 2020

S&G Labs contracts with the Department of Health for COVID-19 testing

March 2020

S&G Labs begins testing for the Covid-19 virus

February 2020

S&G Labs hosts CME conference for providers in Hawaii

August 2017

S&G Labs Hawaii brings their billing department in-house

August 2015

S&G Labs Hawaii officially opens for business

By The Numbers


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Covid - 19 tests run

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Hawaii based business partners



Local employees hired

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Annual scholarships provided (and counting)


Tons of plastic recycled annually

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Our Dedicated Staff

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Lynn Welch, MD

Chief Executive Officer

Lynn Welch, M.D. an internal medicine physician, graduated from Creighton Medical School and completed her residency at Baylor Scott & White Hospital prior to moving to Hilo in 2008. She founded and continues to operate Big Island Pain Center in Hilo, Hawaii since its opening in 2009. She has been an integral part of drug safety and delivery for many years.

Being the only internal medicine doctor inducted into the largest intervention pain society in America, she has been pivotal to the development of narcotic based protocols widely used in pain practice settings.

Her years of clinical experience in high-risk population has given her the insight and drive to develop a safe way to deliver and monitor controlled substance use and abuse.

Her extensive business experience single-handedly gathered the sum of the greatest minds in pharmacology and clinical research to develop her dream of S&G Labs Hawaii.

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Alan Wu, PhD, D.A.B.C.C.

Laboratory Director

Alan H.B. Wu, Ph.D., is Chief of Clinical Chemistry and Toxicology at San Francisco General Hospital and Professor of Laboratory Medicine, University of California, San Francisco.

He received B.S. degrees in chemistry and biology at Purdue University, West Lafayette, Indiana, and a Ph.D. degree in analytical chemistry at the University of Illinois, Champaign-Urbana, Illinois. He completed a postdoctoral fellowship in clinical chemistry at Hartford Hospital. He is certified by the American Board of Clinical Chemistry in Clinical Chemistry and Toxicological Chemistry.

Dr. Wu has written three books for the public, “Toxicology! Because What You Don’t Know Can Kill You”, “The Hidden Assassin. When Clinical Lab Tests Go Awry,” and “Microbiology! Because What You Don’T Know Will Kill You.” These are collection of short stories involving real cases and highlight the importance of clinical laboratory tests for the lay audience.

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Kimberly Clark, MS, cASCP

Scientific Director

Kimberly holds a MS degree from SUNY Fredonia and is certified by ASCP in chemistry. She has over 17 years of professional experience in the public and private sector in the fields of chemistry, biology, and cytogenetics. She has experience in the development and implementation of methods for small molecule analysis using LCMSMS for research, as well as Phase I and II clinical drug trials. She also led the pharmacodynamic portion of the core including gene expression and ELISA assays. She has attained many essential skills including writing publications and reports, meeting with physicians and presenting works at ASMS, AAPS and AACR. She has created budgets and timelines and managed her team with success.

Currently she is employed at S&G Labs in Kailua-Kona, Hawaii utilizing her LCMSMS skills to monitor patients in analysis and detection of pain management drugs / drugs of abuse in high throughput, high complexity testing.

When she is not pippetting she’s either at a playground with her children, biking, running, or promoting healthy lifestyles to our keiki by volunteering in our schools.

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John Rust

Sales Director

John Rust currently serves as the sales director at S&G Labs, Hawaii. He grew up in Lahaina, Maui, attended high school at Seabury Hall, followed by the University of California at Santa Barbara as well as Cambridge University in England.

John is an expert in sales and marketing with over 30 years of experience. In addition to working many years in the medical field, John has also worked in hospitality, finance, and real estate development. He has also lived and worked in Micronesia, Japan, Thailand, and Indonesia.

When not busy working, John spends his time with his wonderful wife and three children. He is also is an avid surfer, fisherman, biker, diver, and cook.

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Sales and Marketing Director

Crystal is originally from the mainland, born & raised in Oregon. She grew up learning the ropes of hard work helping her family run a small business retail store in Gresham, OR. She attended the Art Institute of Los Angeles after high school. Crystal joined the S&G Labs Ohana in 2016 as a part time biller and in 2019 transitioned to the role of the sales and marketing director for the Big Island.

In her free time she loves watching her two boys, 7 & 11 play baseball & football. On the rare occasion when they don’t have a practice or game her family enjoys time together playing & fishing at the beach!

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Andria Tupola, PhD

Operations and Marketing Executive

Andria serves as the VP of Sales and Marketing. She got involved with S&G Labs during the COVID 19 pandemic as a community organizer. She loves serving her community which attracted her to learning more about rehabilitation services and COVID testing offered through S&G.

Andria has a BA, MA, and PhD in Music Education and extensive background in the arts. She has background in designing websites, flyers, brochures, programs, banners, signs, and anything colorful.

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Cody Raich

Sales Associate

Cody Raich is currently a Sales Associate at S&G Labs, Hawaii. He graduated from Michigan State University in East Lansing with a major in Economics. He began his work in the lab industry in 2015 as a consultant and medical billing auditor. In 2019, he moved to Big Island to experience warm weather and world class beaches.

On weekends, Cody can be found hiking Pololu with his wife Courtney, or laying on Mauna Kea Beach.

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Alissa Smith

Client Relations Executive

Alissa Smith currently serves as the Client Relations Executive at S&G Labs, Hawaii.  She has held many client facing positions as an Art Gallery General Manager and in Hospitality Sales and Marketing in Hawaii. 

She began her work with S&G Labs Hawaii in 2018 in the Front Office and continues to draw upon her knowledge gained in Hospitality and brings that welcoming demeanor to her co-workers and clients.

Alissa enjoys cooking, reading, working in her yard and watching movies in her spare time.

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Alayna Gomes

Field Operations Executive

Alayna Gomes currently serves as the Field Operations Executive at S&G Labs, Hawaii Big Island location. She has over 20 years of experience in the medical field managing front-line staff in both hospital & clinical settings.

Her knowledge ranges from customer service, registration, insurance/financial prior authorization approval, EHR IT support, Data Analytics for quality improvement programs.

She began her work with S&G Labs Hawaii in October 2020 and continues to build communication, structure, and efficiency in all front-line processes for the organization.

In her free time Alayna enjoys spending time with her husband & 3 kids, hunting, camping & ranching.

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Sarah Beth Kosem, TT (NRCC)

Lab Operations Director

Sarah Beth Kosem has worked for S&G Labs since 2016, maintaining a role as Lab Operations Director.  She graduated from the University of North Carolina - Wilmington with a Bachelor's degree in Anthropology, Chemistry, and a minor in Forensic Science, is certified as a Toxicological Technologist (NRCC), and licensed in the state of Hawaii.

She began working in toxicology immediately after graduation in 2010 and quickly moved into working with LCMS/MS technology soon after.

Sarah Beth enjoys spending time playing board games with friends, watching reality television, going to the beach, and playing with her Goldendoodle, Kuzco.

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Cayce Aksoy, MT (AAB), TT (NRCC)

Genetic Science Director

Cayce Aksoy was born and raised in Nashville, Tennessee. She graduated from the University of Tennessee with a Biochemistry Degree in 2012 and promptly began working in the toxicology industry. Today Cayce is a certified Medical Technologist (AAB), a certified Toxicological Technologist (NRCC), a licensed Special Analyst in the field of Toxicology by the Tennessee Medical Laboratory Board and a licensed Clinical Laboratory Specialist by the State of Hawai’i Laboratories Division. She moved to Hawai’i in May 2019 to develop new LC-MS/MS methodology for S&G Labs Hawai’i, LLC and was named Director of Genetic Science when she drew from her prior experience with pharmacogenetic testing to help bring COVID PCR and cellular match assays to the laboratory in 2020. Cayce loves to read, run, clean, snorkel, play with her Golden Retriever and sleep in her free time.

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Samantha Stone

IT Executive

Samantha Stone currently serves as an IT Executive at S&G Labs, Hawaii. She attends the University of Colorado in Denver where she is double majoring in Biochemistry and Computer Science. She began her work in the laboratory industry in 2014 as a certified phlebotomy technician, CPT (NHA) and continues to broaden her knowledge in chemistry and IT related topics.

In her free time she loves to hike and trying new restaurants.

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Shelley Andrade

Finance Director

Shelley Andrade has worked for S&G Labs Hawaii for 10 years and currently serves the Finance Director. She lived in Hawaii for 25yrs and now calls Colorado home, where she is a hockey mom of two amazing kids.

In her spare time enjoys hiking, bike riding and being a volunteer to various organizations.

We are passionate about the health and well-being of our community. If you are too, this is the right place for you.

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Cutting Edge Technology in Laboratory Testing

S&G Labs - Honolulu
1520 Liliha St, #501,
Honolulu, HI, 96817

Hours: M, T, R 10AM - 2PM HST

Phone: (808) 892-1202

S&G Labs - Kailua-Kona
75-240 Nani Kailua Drive, STE 11A,
Kailua-Kona, HI 96740

M - F 8AM - 4PM HST

Phone: (808) 329-9675

Questions about COVID-19 Testing or results please call: (808) 900-7474

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