A team you can count on

Pushing the Dairy Industry Forward

An incredible team of lab and field experts, available when you need us.


Our team leads progression

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.

Dr. Greg Goodell


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.

Tessa Kelly

Lab Manager

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.

Christine Goodell


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.

Candice Lewallen

asst lab manager/Lab Tech

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!

Laurel Nelson


Josh graduated from Colorado State University with a B.S. in Biological Science in the summer of 2009. Since then, his employment has primarily been in wildlife, performing various surveys while researching fish and birds. He joined our team in June 2017. Josh spends most of his time on the DHIA side of the lab running milk components. He also occasionally picks up and delivers samples.

Josh Olsen

Lab Tech

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.

Julia Michels

Lab Tech

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.

Diana Litzenberger

Lab Tech

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.

Rob Pantaleo


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. 

Tess Nally

Lab Tech

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.


Lab Tech

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.

Isabel Guzman

field tester supervisor

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.

Vianca Kincaid

Human Resources Generalist

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.

Karen Montes

Lab technician

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.

Mariafelix Puente

Lab technician

Danni started working with the TDA lab in March of 2023. Before working here, she worked on her family’s dairy farm, irrigating their silage all summer and helping care for the cows in the winter. She assisted with preg checking and handling the animals. Danni spends her time at TDA primarily in the Mastitis lab.

Danni Podtburg

Lab technician

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.

Robert Pfutzenreuter

Lab technician

Atlas started with TDA in June 2022. He grew up helping on a dairy farm, where he found his passion for agriculture. Atlas spends his time on the DHIA side of the lab running milk components and helping prepare samples for PCR testing. He plans to get a B.S. in Microbiology from Colorado State University while continuing to work at TDA.

Atlas Guzman

Lab technician