Laboratory and Brand Management Experts

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Don Meyer, Rock River Laboratory President and OwnerDon Meyer

President and Owner                                                        
Don Meyer graduated from the University of Wisconsin, Milwaukee with a Bachelor of Science degree in geography in 1975. Shortly after, he attended graduate school at the University of Wisconsin, Madison and the University of Wisconsin, Milwaukee. Don’s passion for science and analysis combined with a little support from a local agriculture retailer, helped him build Rock River Laboratory agriculture analysis, which opened in 1976 and is running strong in the fields of agronomy, feedstuff, manure and water analysis yet today. Don’s progressive thinking made him an early adopter of near infrared (NIR) technology as an analysis tool, and his work with this technology has forged new frontiers in the use of NIR technology in the lab and on-farm. Read More One of the original founders of the National Alfalfa Hay Testing Association (now known as the National Forage Testing Association), Don served as the Chairman of the organization twice. Don also served on the Board of Directors for the NIR consortium and was the only private industry member of the USDA-NIR Forage Network. Striving for industry progress by improving analysis accuracy and incorporating new technologies and tools, Don has remained dedicated to helping agronomists, nutritionists, producers, and growers achieve success through improved outputs. 

Don can be reached at: don_meyer@rockriverlab.com

Zachery MeyerZachery Meyer, Rock River Laboratory Director of Operations

Director of Operations
Raised in Ixonia, Wis., Zachery Meyer grew up immersed in his family’s business, Rock River Laboratory.  Meyer spent many hours helping in various jobs around the laboratory, seeing first-hand the dedication and commitment his father and the late Twilah Kulow had to the business and their customers.  Meyer gathered business experience at two prominent, Fortune 500 companies while working toward his degree from the University of Wisconsin-Milwaukee. In 2007, Meyer resumed his involvement in Rock River Laboratory, starting as a soil sampler, moving to outside sales and eventually taking on his current role of director of operations. READ MORE Meyer still gathers inspiration from the Rock River Laboratory employees and mentors who cultivated his drive for customer satisfaction and service, while continuing to learn and deepen his understanding of animal nutrition and agronomy. When he isn’t building relationships with customers or overseeing laboratory operations, Zac spends his time playing or watching sports and sharing in family time with his wife and two young daughters.

Zachery can be reached at: zachery_meyer@rockriverlab.com

Dustin Sawyer, Rock River Laboratory Lab DirectorDustin Sawyer

Laboratory Director
Born and raised in Wisconsin, Dustin Sawyer gained a love of the outdoors, mechanics and engineering throughout his years growing up near the town of Wisconsin Rapids. In 2004, Sawyer earned his Bachelor of Science degree in Soil Science and Chemistry from the University of Wisconsin- Steven’s Point. That same year, he put his vast conservation knowledge and experience toward an internship for the Wood County Land Conservation Department, where he worked with growers on implementing preservation practices throughout their operations. Guided by a desire for continued learning and passion for science, Sawyer has earned his Master’s Degree in Soil Science through the University of Wisconsin – Madison. He continues his over 13-year tenure at Rock River Laboratory headquarters as the Laboratory Director, guiding the direction of lab analysis practices, processes, quality assurance and quality control with a detailed eye. Read More He maintains involvement in key industry groups through his memberships in the Soil Science Society of America, the American Society of Agronomy, the Crop Science Society of America, and is a board member on the Soil and Plant Analysis Council, the National Forage Testing Association, and the Illinois Soil Testing Association. Sawyer still finds time outside the lab to enjoy the outdoors that brought him to where he is today through kayaking, fishing and exploring.

Dustin can be reached at: dustin_sawyer@rockriverlab.com

Lauren MeyerLauren Meyer, Rock River Laboratory Quality Control and Product Development Manager

Quality Control and Product Development Director 
Hailing from Ixonia, Wis., Lauren Meyer grew up in the midst of her family’s business, Rock River Laboratory. After spending many childhood hours at the lab helping with everything from folding filter papers to stickering soil analysis bags, Meyer came back to the laboratory every summer between her college years to assist in the Rock River Laboratory soils department. In 2007 she earned her bachelor’s degree in Psychology from the University of Wisconsin-Milwaukee and decided to follow her passion back to the family business. She joined the Rock River Laboratory team full time in first the agronomy department, then in the nutrition department, all while finding great appreciation for the opportunity to work alongside her father, Don, and brother, Zachery,  with the common goal to make Rock River Laboratory one of the best in the industry. Read More Since then, Meyer has taken on the role of forage lab supervisor, and eventually quality control and product development director, where she works to review and deliver laboratory results, support suppliers, maintain quality control programs, and assist in developing both calibrations and new products. 

Lauren can be reached at: lauren_meyer@rockriverlab.com

Eva Lynch, Rock River Laboratory Wet Chemistry Lab SupervisorEva Lynch

Wet Chemistry Lab Supervisor
Born and raised in Watertown, Wisconsin, Eva Lynch grew up in the midst of a prime agriculture pocket, and spent most of her youth involved in the 4-H Horse and Pony Project. Her passion for science and technology drew her to earning an Associate’s degree in Biotechnology from Madison Area Technical College-Truax in 1998. After college, Lynch utilized her skill base in various roles during her career build – including quality control lab technician testing milk replacer ingredients and final products, organics laboratory technician analyzing water and soil for contaminants, and as a GCMS specialist, assisting the company in earning ISO accreditation for phthalates analysis in plastics. Lynch joined Rock River Laboratory in 2014, and her vast experience in High Performance Liquid Chromatography (HPLC), Gas Chromatography (GC), and Mass Spectrometry (GC-MS) technology has helped Rock River Laboratory continue to lead the industry in use of the latest technology. Read More Lynch is also an inspired member of the Association for Women in Science (AWIS), which encourages leadership, research and ideas to advance women in STEM careers. When she isn’t knee high in science, Lynch can be found horseback riding, gardening and spending time with her children. 

Eva can be reached at: eva_lynch@rockriverlab.com

Devin SawyerDevin Sawyer, Rock River Laboratory Executive Assistant

Human Resource Administrator & Nutrient Management Assistant
Growing up in the Central Sands of Wisconsin, Devin Sawyer attended school in the district of Wisconsin Rapids, Wis.  After earning her degree in Business Administration as an Administrative Professional, Sawyer grew her passion for science and agriculture working in the Rock River Laboratory agronomy laboratory, where she had the opportunity to see behind the scenes of the operation. She fostered this new found agriculture interest as she grew into her current role, which includes reviewing and assembling over 300 Nutrient Management Plans (NMPs) per year. Her knowledge gained from a comprehensive look at the industry from small to large farms offers the whole Rock River Laboratory team outside insight. Read More When Devin isn’t managing the Rock River Laboratory Watertown headquarters office or reviewing NMPs, she can be found outdoors – enjoying camping and kayaking, gardening and capturing fantastic outdoor scenes on camera. 

Devin can be reached at: devin_sawyer@rockriverlab.com

Doug ArterburnDoug Arterburn, Rock River Laboratory Information Technology Project Manager

Information Technology Project Manager
Born and raised on his family’s 160-acre diversified farm near Greenfield, Iowa, Doug Arterburn attended college in his home state, graduating from Iowa State University in 1978 with a Bachelor of Science degree in Computer Science. Arterburn found a way to combine his specialty skill set and background in agriculture through roles as a systems programmer and applications programmer, handling database management, network management, and firewall management for large agriculture companies, all before joining the Rock River Laboratory team in 1981. Arterburn’s vast experience in agricultural programming has helped, and continues to keep Rock River Laboratory on the forefront of technology for the past 35 years. From the time of his first Rock River Laboratory project, writing “Personalized Dairy Rations” using an Apple II computer in Applesoft Basic, Read More Arterburn’s extensive tenure has afforded him the opportunity to witness and participate in the exponential growth and adoption of new technology in agriculture. When he isn’t writing code, Arterburn enjoys the outdoors and still fosters his competitive spirit through Frisbee golf, tennis, hiking and reading. 

Doug can be reached at: doug_arterburn@rockriverlab.com

Buffy Uglow, Rock River Laboratory Marketing and Communications DirectorBuffy Uglow

Marketing and Communications Director
Raised on a small farm near Melrose, Wis., Buffy Uglow developed a passion for agriculture at a young age while helping her family raise Belgian Draft Horses and later working with her sister and brother-in-law’s cow-calf operation. This passion drove her to focus on Animal Science and Life Sciences Communication at the University of Wisconsin-Madison, and she nurtured her agriculture experience through internships with the University of Wisconsin Equine Extension and an agriculture marketing firm. After earning a Bachelor of Science degree in 2008, Uglow took on marketing executive role for an agriculture marketing agency, spending time writing, developing producer and grower-directed materials, leading advertising campaigns and planning marketing strategies for various feed, reproduction, and pharmaceutical companies. Uglow joined Rock River Laboratory in 2014 and has utilized her past experience to expand media and public relations and facilitate the Read More growing marketing and customer relationship needs of the team. She is actively involved on the Wisconsin State Fair Dairy Promotion Board and the Wisconsin Farm to Table Committee, and when Uglow isn’t writing or designing, she spends her time with her husband and dog, helping on her in-laws dairy farm, and capturing agriculture through the lens of her camera. 

Buffy can be reached at: buffy_uglow@rockriverlab.com

Chad HenkeChad Henke, Rock River Laboratory Controller

Controller
Growing up in Ashwaubenon, Wis., Chad Henke spent his younger years enjoying frequent visits to his grandparent’s cash crop farm and aunt and uncle’s small dairy farm. He went on to pursue his interest in business, earning a Bachelor of Business Administration degree in 2001 from the University of Wisconsin-Milwaukee, in the areas of Real Estate Development and Finance, with a minor in Urban Planning. After college, Henke put his degree to work as a financial analyst conducting accounting and financial analysis for a mid-sized medical real estate development company. In 2013, Henke joined the Rock River Laboratory, assuming the role of controller and taking on both accounting and logistics needs of the business. Read More In his free time, Henke can be found enjoying time with his family, as well as waterskiing, boating and ice skating. 

Chad can be reached at: chad_henke@rockriverlab.com

Jacob Karlen, Rock River Laboratory NIR ManagerJacob Karlen

NIR (Near Infrared) Manager
Growing up on a farm near Monticello, Wis., Jacob Karlen developed a love for agriculture while helping his family run their 80-cow dairy, and through his involvement in his high school FFA chapter, including serving on the officer team and attaining his American Degree. This passion grew into an appreciation for the biological sciences, and lead Karlen to pursue a Bachelor of Science degree in Biochemistry from the University of Wisconsin-Madison, in 2008. Karlen further developed his scientific research skill set while contributing to sample processing and scanning at the USDA-ARS-Dairy Forage Research Center (DFRC) while on campus earning his first degree. After taking a hiatus from the DFRC to pursue a feed company Quality Assurance-focused internship, Karlen returned to expand his involvement with NIR operations, developing his interest in this technology, and shuttling him into a role with the NIRS Forage and Feed Testing Consortium (NIRSC). This experience grew his capabilities and desire to pursue data handling and statistics. Prior to joining Rock River Laboratory in 2015, Karlen served as a laboratory technician and data manager for the NIRSC. In his current role as NIR manager for Rock River Laboratory, Karlen works to track, manage, and maintain Rock River Laboratory’s extensive network of NIR instruments Read More – both domestic and abroad. He is also continuing his education, pursuing a Master of Science degree in Biological Systems Engineering, with a project focusing on portable NIR instrumentation. 

Jacob can be reached at: jacob_karlen@rockriverlab.com


Kelsie HinesKelsie Brennan, Rock River Laboratory-Northeast Lab Manager

Lab Manager, Rock River Laboratory-Northeast
Born and raised near Wyoming, N.Y., Kelsie Hines was rooted in agriculture from a young age thanks to her family's business raising Limousin beef cattle, and her involvement in 4-H showing registered Jerseys at the local and state fair level as well as raising market hogs. This agriculture passion grew as she worked on local family dairy farms throughout high school and into her college years. Hines earned an Associate's degree in Agricultural Business from Alfred State College in 2011 and utilize her agriculture skill set to start a career as a laboratory technician at an agriculture laboratory in New York. Hines moved on to another analytical agriculture laboratory before joining Rock River Laboratory in 2016. As the laboratory manager for Rock RIver Laboratory-Northeast, Hines oversees all analysis at the lab while manager her additional team members and maintaining customer relationships. Read More  In her free time, Hines enjoys showing dairy cattle, baking, hunting, kayaking, and spending time outdoors, along with traveling back toher hometown in western New York regularly to visit her family. Now residing in Marathon, N.Y., home of the Central New York Maple Festival, Hines has learned and even participated in the long lost art of maple syrup production. 

Kelsie can e reached at: kelsie_hines@rockriverlab.com


Jeff DeGroot, Rock River Laboratory West Lab ManagerJeff DeGroot

Lab Manager, Rock River Laboratory - West
Hailing from Fresno, Calif., Jeff DeGroot spent much of his childhood helping on his family’s 1600-cow dairy farm. These roots developed and secured his passion for a life and career in the dairy industry, which eventually carried him to a field technician role with the local Dairy Herd Improvement Association (DHIA). DeGroot joined Rock River Laboratory in 2009 as the manager of Rock River Laboratory-West in Visalia, Ca. In his role there, DeGroot overseas processing of samples submitted at that location while maintaining customer relationships. In his free time, DeGroot enjoys camping with his family, hunting, and riding UTV/ ATVs. 

Jeff can be reached at: jeff_degroot@rockriverlab.com

Mary RosiejkaMary Rosiejka, Rock River Laboratory-North Central WI Lab Manager

Lab Manager, Rock River Laboratory - North Central Wisconsin
Born and raised in Chicago, Ill., Mary Rosiejka moved with her family to a dairy farm in Withee, Wis. at the age of 14. Until her high school graduation in 1976, Rosiejka worked side-by-side with her father both in the barn milking cows and in the fields tending to the crops. Rosiejka's time on the farm gave her a deep appreciation for the agriculture way of life. Prior to her time at Rock River Laboratory, Rosiejka garnered experience as a grocery store produce manager and took on several roles within the customer service realm in various industries - including trucking, saw milling, and in cheese distribution. Her vast experience and well-rounded background have helped shape her successful management of Rock River Laboratory-North Central Wisconsin, in Colby, Wis., where she runs all Near Infrared (NIR) analysis Read More samples submitted there while managing client relationships. Outside of her weekday career, Mary enjoys do-it-yourself projects, woodworking, four-wheeling, spending time outdoors, and soaking in time with her mother, husband, son, daughter, son-in-law, and granddaughters. 

Mary can be reached at: mary_rosiejka@rockriverlab.com

Danae Cummings_Rock River Laboratory Agronomic Lab Supervisor, Rock River Laboratory-NortheastDanae Cummings

Agronomic Lab Supervisor, Rock River Laboratory - Northeast 
Growing up in Maine, NY, Danae Cummings spent much of her time on her uncle’s dairy farm helping mow hay and feed cows, with a portion of her time devoted to petting the farm’s kitten population. After earning associate’s degrees in medical laboratory technology and individual studies, as well as a certificate in phlebotomy from State University of New York (SUNY) Broome in 2010, Cummings became a licensed Medical Laboratory Technician. She took on a lead lab technician role at a physician’s office lab where she maintained all analyzers and upheld testing quality assurance. Cummings gained further laboratory experience at a local hospital serving as a microbiologist performing Polymerase chain reaction (PCR) testing, deoxyribonucleic acid (DNA) testing, antigen testing, and plating and examining microorganisms, before joining Rock River Laboratory as a laboratory technician in 2016. In her latest role of agronomic lab supervisor for Rock River Laboratory-Northeast, Cummings overseas all wet chemistry analysis at the lab while managing the agronomic lab team READ MORE and providing customer service. When Cummings isn’t in the lab, you can find her enjoying her hometown of Maine, while gardening, cooking and baking, reading, making her own beer and maple syrup, and spending time at her parents’ cottage on Cayuga Lake. 

Danae can be reached at: danae_cummings@rockriverlab.com

Andy SchroederAndy Schroeder, Rock River Laboratory Soil Laboratory Assistant Supervisor

Soil Laboratory Supervisor
Hailing from West Bend, Wis., Andy Schroeder developed a love for the land and conservation at a young age, eventually leading him to pursue a Bachelor of Science degree in Soil and Land Management from the University of Wisconsin-Stevens point. Building his experience, Schroeder planted and maintained field windrows and windbreaks as part of the Central Wisconsin Windshed Partnership (CWWP) before graduating in 2015. After spending time monitoring forest unit soil and mapping data as a soil technician for the United States Department of Agriculture (USDA) Forest Service, Schroeder joined the Rock River Laboratory team in 2015. Presently, Andy also serves as secretary for the Illinois Soil Testing Association (ISTA). In his current role of Soil Laboratory Supervisor, Schroeder oversees soil and plant tissue analysis processes and the team members that contribute to accurate analysis. When he isn’t donning a lab coat, Andy can be found rock climbing or hiking. 

Andy can be reached at: andy_schroeder@rockriverlab.com

Rock River Laboratory

Founded in 1976, Rock River Laboratory is a family-owned laboratory network that provides production assistance to the agricultural industry through the use of advanced diagnostic systems, progressive techniques, and research-supported analyses.  Employing a team of top specialists in their respective fields, Rock River Laboratory provides accurate, cost-effective, and timely analytical results to customers worldwide, while featuring unsurpassed customer service.

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