Excellent! 4.8/5.0

Pushing the Dairy Industry Forward

Meet the team behind The Dairy Authority. Get to know us, our backgrounds, and our dedication to the dairy community.

Serving the Dairy Community Across the Nation


Based in Colorado


Coast-to-Coast Service


Dairy's Served Nationwide

Our Veterinarians. Pioneers in Dairy Health.

A team of talented vets united by one mission: to ensure your dairy herd's optimal health and productivity with industry-leading services.

A talented team of dairy experts


Dr. Greg Goodell

Dr. Goodell completed his undergraduate work at the University of Northern Colorado from 1987 to 1990 pursuing a biochemistry major with a minor in microbiology. He graduated from Colorado State University with his DVM in 1994. After graduation he specialized in mastitis and mastitis research placing emphasis on epidemiology and microbiology of mastitis pathogens.

Lab Manager

Tessa Kelly

Tessa has a B.S. in Animal Science from Colorado State University and has been with TDA Labs since its inception in 2003. She is also trained as a veterinary technician. Her background in Animal Science allows her to utilize those skills assisting in research projects and veterinary services and her duties in the microbiology lab. Tessa is also certified in ELISA and PCR assays.


Christine Goodell

Christine has a B.A. in Economics and Finance from the University of Northern Colorado. She began her career working with Banner Health in Greeley. Christine changed her career in 2006. She has also completed her training in microbiology.

Assistant Lab Manager/Lab Tech

Candice Lewallen

Candice joined the TDA Labs team in January of 2008. Candice holds a B.S. in Animal Science from Colorado State University and is also a veterinary technician. She splits time between the lab and field work on research projects.


Laurel Nelson

Laurel started with TDA Labs in April of 2013. Laurel is our client liaison between the laboratory and our lab clients and manages the courier service TDA Labs has for picking up and delivering samples. If you see the white Ford Transit with the TDA Labs logo on it, chances are Laurel is driving it!

Lab Tech

Julia Michels

Julia graduated with a B.S. in Microbiology from Colorado State University and has worked in a couple of other labs before coming to TDA in August 2016. Her main duties are milk bacteriology, CHARM testing and back up for ELISA testing, assisting with Health Certificates, and updating vaccination records.

Diana Litzenberger

Diana started with TDA in 2021. She grew up on her family's farm, where she found her passion for agriculture and the livestock industry. She obtained her B.S. in animal science from Colorado State in 2021. Here at TDA she works primarily in the feed lab as well as the microbiology lab.


Rob Pantaleo

Rob was born in San Diego, California. He moved to Greeley, Colorado in 2010. He loves being on the road and interacting with all our clients at the Dairy Authority. Rob attended school at the University of Oregon and have two daughters. He also enjoy hanging out with his dogs and his favorite hobby is running. He'd love to introduce himself to you, so if you see him please say hi.

Lab Tech

Tess Nally

Tess graduated from Aims Community College in May of 2021 with an A.A in Animal Science. Immediately following that, her passion for livestock and agriculture led her to join our team. She works primarily in the Feed Lab, which was supplemented by her time on her family farm here in Weld County. She also assists in the bacteria and mastitis labs, as well as the occasional call to help a vet in the field.

Lab Tech

Veronica Magana-Buie

Veronica obtained a BS in Molecular Cell Biology at the University of California, Merced in 2020. From there, Veronica’s work consisted of carrying out forest ecology research in various regions of California and later heading an analytical lab. Upon joining the TDA laboratory team in February 2022, her primary focus has become the PCR lab where she tests for various pathogens and helps to optimize PCR specific protocols.

Field Tester Supervisor

Isabel Guzman

Isabel was born and raised in Veracruz, Mexico where she used to be an accountant before moving to Colorado. Her job here at TDA is Field Tester Supervisor; where she is responsible for DHIA testing on our local dairy herds.

Human Resource Generalist

Vianca Kincaid

Vianca was born and raised in Puerto Rico. She graduated from the University of Puerto Rico with a B.A. in Human Resource Management. She started her career in the hospitality industry as HR Coordinator before she moved to Colorado. She joined The Dairy Authority in September 2021. Her primary role is to work as a Human Resources Generalist handling all employees' relations, onboarding process among other tasks. She also assists on providing bilingual training for the dairies.

Lab Tech

Karen Montes

Karen’s family moved to Colorado in 2007 from California. She graduated with a B.S. in Biology Pre-health from the University of Northern Colorado in spring of 2020 and is a Certified Pharmacy Technician. She started working at TDA in 2022, where she primarily works in the Elisa lab.

Lab Tech

Mariafelix Puente

My name is Mariafelix Puente. I served as CRPS within theNavy for 4 years. I then went to attend Colorado State University in 2018 whereI obtained a BS in Zoology. Soon After I began working as a Lab Technician at a microbiology lab. I am a microbiologist at TDA, and I enjoy spending time with my family.

Lab Tech

Robert Pfutzenreuter

Bobby was born in Chicago. He graduated from Colorado State University in the winter of 2022 with a degree in fermentation science. He worked as a distiller and a brewer for a few years before he decided to join the TDA team in January 2023. He mainly splits his time between the mastitis and feed labs. Bobby enjoys doing a lot of skateboarding, hacky sacks, and playing games on his computer during his time off.

Lab Technician

Justin Kontour

Justin was born and raised in Greeley, Colorado, and graduated from Redstone College with an associatedegree in Wind Energy Technology. Justin has a sonwith whom he spends most of his time; Justin also enjoysmusic and drawing. Justin helps at the TDA lab in the DHIA lab processing samples.

Media Technician

Kapethomas Chandler

Kape was born and raised in Las Vegas, New Mexico. After graduating high school, Kape pursued a degree at New Mexico Highlands University. He graduated from NMHU in 2020 with a Bachelors of Science in Forestry, concentration in Forest Management. In the summer of 2023, Kape made the decision to move to Greeley, Colorado. Shortly after moving, Kape joined The Dairy Authority team. Kape works as a Media Technician, who also assists in the bacteriological laboratory. Kape spends his free time playing video games, being outdoors, playing guitar and spending time with his cat.

Feed & SCC Testing

Ryan Throckmorton

Ryan began work at TDA in September 2023. He has been involved in agriculture since he was kid, with his family breeding and raising show pigs until 2008, when they made the switch to registered Boer goats. Ryan also brings experience working with dairy farm families from more than ten years of on-farm feed sales throughout northern Colorado. Ryan holds an associate degree in animal science from Redlands Community College, and his work at TDA is primarily focused on feed and SCC testing