Meet The Team
Sean Callan, Chief Operating Officer
As COO, Sean leads day-to-day strategic objectives for Ellipse across testing, data analytics, and innovation. Prior to joining Ellipse Analytics, he was a neuroscience researcher specializing in the intersection of psychology, chemistry, biology, and statistics. When he's not at work, Sean spends his time playing with his two dogs, who he likes more than most people.
Chela Wallin, Senior Scientist & Toxicologist
As Senior Scientist, Chela leads Consumer Insights, Data Analytics, Toxicology, and Research to inform innovation and category market projections. While at Ellipse Analytics, she is also defending her PhD at Wayne State University where she is a neuroscience researcher specializing in developmental psychobiology, pharmacology, and statistics. Outside of work, you can find Chela exploring the mountains with her Doberman and German Shepard--two of our favorite EA office dogs.
Brianna Raymes, Operations Manager
Brianna Raymes is the Operations Manager at Ellipse Analytics. She completed her Master of Public Health with a concentration in Epidemiology and Global Health. Bri is especially passionate about public health, finding unique solutions to fit client needs, and collaborating with the EA team to help make data driven decisions.
When she’s not at the lab, Bri enjoys spending her time outside, skiing, attending concerts, and enjoying the beautiful mountains of Colorado.
Rob Kevwitch, Lab Director
As Lab Director, Rob directs analysts and technicians to develop new analytical methods for our ISO certified lab while maintaining priorities. Rob also participates in Ellipse Analytics innovation initiatives to assist customers in product formulation. Rob has previously held R&D roles in industries such as semiconductors, oil field chemicals, heterogeneous catalysis, and food and beverage. Outside of the office, Rob might be found on his mountain bike but he's usually out of cellular range so he can't be found.
Amanda Kerr, Lab Tech I
Amanda graduated with a B.S. in Biochemistry from South Dakota State University in May 2021. Moving back to her hometown of Denver, she was enthusiastic to start her career with Ellipse Analytics.
Outside of work Amanda likes to spend time snowboarding and trying new restaurants.
Melanie Hopek, Lab Assistant
I completed my undergraduate studies at the University of Colorado in Boulder. I use the skill acquired during my time at CU Boulder to assist Ellipse Analytics grow as a company.
Outside of work I enjoy crafting, rearing my children, and being in nature.
Sam Riddle, Lab Tech I
Sam is working part time as a Tech while finishing his PhD at the Colorado School of Mines. He is passionate about using Chemistry to innovate and enrich people’s everyday lives.
Outside of work, Sam explores the beautiful Colorado landscape with his mountain bike or trail running shoes. He also enjoys working on a collection of older project cars and motorcycles with his close friends.
Melissa Rosa, Analyst II
Melissa obtained her BA in Chemistry from Indiana University, with minors in Biology and Outdoor Recreation. Melissa has been working in industry since 2014 and brings a wide array of knowledge and experience to the team.
She enjoys hiking, snowshoeing, and snowboarding outside of work.
Kimberly Williams, Flavor Chemist
I moved to Denver, Colorado from North Carolina, where I lived for most of my life. I have been working at Ellipse Analytics since 2019, and I am currently a flavor chemist.
In my free time, I enjoy hiking with my German Shepherd, Henry, or skiing.
Steve Schlitzer, Lab Technician II
Steven graduated with a BS in Chemistry from Miami University in 2015 before moving to Oklahoma with his wife Bre. There he completed his Ph. D. in organic chemistry in 2020, with a dissertation titled “Cascade Reactions to Access Bioactive Scaffolds,” before moving to Colorado to forge a career in science.
Charlie VanDenburgh, Analyst I
I graduated from the College of Wooster in Wooster, OH with a BS in chemistry and promptly moved to Denver to pursue dreams of living by the mountains in 2019. A
After college, I pursued a career in trace metals analysis and in my off-time I found a passion for camping and gravel biking.
Amy Kuhn, Senior Chemist
Amy is a Senior Chemist and the Quality Manager for Ellipse Analytics. Prior to Ellipse, Amy was a Chemist for the U.S. Geological Survey's National Water Quality Laboratory, where she worked on a broad range of projects and methods with both the Inorganic and Organic departments. She was recognized for her achievements in high profile projects including Hurricane Katrina, Gold King Mine Spill, Deepwater Horizon Oil Spill, and BPA studies.
Nicole Pike, Senior Chemist
As a senior chemist Nicole manages the daily analysis of multiple projects over multiple analyses and reviews all data to ensure accuracy. Outside of work Nicole can be found hiking with her dog.
Shane Smyth, Flavor Associate
Shane obtained his Bachelor of Science with a focus in food science & product development from the University College of Dublin. Previously, Shane has developed products across a broad array of industries which include alcoholic beverages & fast-food products for multinational corporations. Outside of the lab, Shane can be found exploring the mountains of Colorado.