Our Team

Nat Dellavalle

Founder
Chairman of the Board
Soil Scientist
Senior Agronomist

Nat is the Founder of Dellavalle Laboratory, Inc. He earned a Bachelor’s in Soil Science from Cal Poly. After graduation, Nat gained valuable on-farm experience prior to setting up several successful agricultural laboratories. He is a Certified Crop Adviser and Certified Professional Agronomist/Soil Scientist. Nat has served as President of the American Society of Agronomy -California Chapter, President of the Soil and Plant Analysis Council, and has served on many University, Agricultural and Environmental committees.

Ben Nydam

President
Sr. Agronomist

Ben is the President of Dellavalle Laboratory and has been with the company since 1990. He grew up on an almond farm near Turlock, CA and studied Agricultural Engineering at Cal Poly, San Luis Obispo. Ben is an irrigation specialist and a Certified Crop Adviser. In addition, he is a past President of the American Society of Agronomy and a member of the Technical Advisory Committee for the North Fork Kings Groundwater Sustainability Agency. As an Agronomist, Ben serves clients throughout Tulare and Kern counties.

Keith Backman

Vice President
Sr. Agronomist

Keith has a Master’s degree in Horticulture/Pomology from U.C. Davis. He is also a Certified Crop Adviser, Certified Professional Horticulturist, and a California Water Distribution Operator. Keith has served as an expert witness for many Ag projects throughout the state and has vast lecturing experience for Universities and professional Associations and Conferences. He is also a contributing author for the Western Fertilizer Handbook and has been involved in the writing of Certified Crop Advisor Exams. Keith served as a Sr. Agronomist/Consultant for over 45 years and now offers his support and expertise to the rest of the Agronomy Team.

Danyal Kasapligil

Secretary/Treasurer
Manager (Davis, CA)
Sr. Agronomist

Danyal received a BS in Plant Science from U.C. Davis, and an MS in Agriculture from Cal Poly. He has worked as a certified crop advisor for over 25 years and is also a certified professional agronomist, water system distribution operator (D-1) and a licensed pest control advisor. A past president of the California Irrigation Institute he currently serves on the advisory board for the western region certified crop advisors. Danyal manages our office in Davis and works with growers throughout northern California, providing assistance with plant nutrition, soil fertility, irrigation management, and soil site assessments for new developments.

Scott Fridlund

Principal
Lab Director

Scott has a Masters of Agricultural Chemistry from U.C. Davis. He worked in the Division of Agricultural and Natural Resources Lab prior to joining the Dellavalle Laboratory team in 1993.

Andrew Koetsier

Agronomist

Andrew grew up working on his family’s farm. He has experience in both farm and dairy operations. Andrew studied Plant Science and Ag Business at Dordt University. He is a Certified Crop Adviser and works as an Agronomist for Dellavalle Lab. He serves the South Valley assisting growers in irrigation management, crop nutrition and more.

Annie Collins Burkholder

Partner
Soil Scientist
Sr. Agronomist

Annie attended the University of Dallas where she studied Biology and Environmental Science. She then earned a Master’s degree in Soil Science from U.C. Davis in 2009. She is a Certified Crop Adviser and a Certified Professional Soil Scientist. Annie has served on the board of the California Chapter of the American Society of Agronomy and the Soil Improvement Committee. As a Soil Scientist and Agronomist for Dellavalle Lab, Annie serves clients throughout Yolo, Solano, Colusa and the surrounding counties.

Bill Blanken

Sr. Agronomist

Bill studied General Ag and Crop Science at Fresno State University. He is a Pest Control Adviser and a Certified Crop Adviser. He has served on the Tulare Kings CAPCA Board and the Kings County Fish and Wildlife Committee. Bill has been working in agriculture his entire life and started working as an Agronomist with Dellavalle in 2004. He currently serves farm and dairy clients throughout Kings and Tulare counties.

Carlos Olmedo

Agronomist
D1/T1

Carlos studied Agriculture at Woodland Community College and Business at CSU Sacramento. He has worked for Dellavalle Lab since 2012. He started as a Field Technician where he gained experience and studied to become a Certified Crop Adviser. Carlos is also a Distribution Operator (D1) and Treatment Operator (T1). He now serves both agricultural and environmental clients throughout Sacramento, San Joaquin, Stanislaus and surrounding counties.

Chad Reenders

Agronomist
Manager (Hanford, CA)

Chad studied Agricultural Engineering at Cal Poly San Luis Obispo. Prior to joining the Dellavalle Team, he gained valuable experience working on a farm that produced food and forage crops, as well as tree nuts. Chad has been a guest lecturer at Cal Poly, Cuesta, and Fresno State in soil and plant science classes. Chad is a Certified Crop Adviser serving Southern Fresno, Northern Tulare, Kings, San Luis Obispo, and Santa Barbara counties.

Cynthia Tiemersma

Dairy Technician

Cynthia was raised on her family’s dairy farm in Tulare County. She attended Dordt University where she graduated with a degree in Agriculture: Biotechnology. As a Dairy Technician for Dellavalle Lab, she assists dairy farmers with nutrient management, Dairy General Order regulations and requirements, and Comprehensive Nutrient Management Plans. Cynthia primarily works in Kings and Tulare Counties but also assists dairymen throughout the San Joaquin Valley.

Joe Voth

Sr. Agronomist

Joe studied Viticulture at Fresno State University and has worked in California agriculture since 1980. He has had roles in major farming companies as a researcher and head agronomist. Joe holds a Qualified Applicator License, he is a Pest Control Advisor, a Certified Professional Agronomist, and a Certified Crop Adviser. He has served on the California Almond Board and the Kern County CAPCA Board. As an agronomist for Dellavalle, he works with growers throughout Kern County and offers his experience and expertise in soil, water, and nutrient management to the rest of the Agronomy Team.

Lisa Rubin

Agronomist
Technical Consultant

Lisa specializes in Regulatory Compliance. She works on Waste Discharge Requirement reporting, Sediment and Erosion Control Plans, Comprehensive Nutrient Management Plans, and many other permitting and compliance projects. Previously she worked at the State Water Board and has been with Dellavalle Lab since 2015. Lisa is a Certified Crop Advisor and Certified Technical Service Provider for CAP 102. In addition, she has a Bachelor’s in Plant Health Studies from Fresno State and an Associate’s in Natural Science and General Agriculture from Reedley College.

Sam Daud

Manager (Fresno, CA)
Agronomist

Sam attended U.C. Davis where he earned a Bachelor’s degree in Sustainable Agriculture and Food Systems with an emphasis in Agriculture and Ecology. He is a Certified Crop Adviser and the manager of the Fresno Agronomy team. As an Agronomist, Sam works with growers throughout Central California providing support in the areas of plant nutrition, soil fertility, irrigation management, and regulatory compliance.

Maribel Garcia

Food Safety Specialist
Office Administrator (Hanford)

Maribel attended Cal Poly, Pomona where she earned her bachelors in Microbiology with a minor in Chemistry. She specializes in food safety and is the Hanford Office Manager. Maribel assists clients in the Tulare and Kings counties.

Martin James

Environmental Specialist
D3/T2

Martin studied water treatment at Fresno City College and Sacramento State Water Programs. He has worked with drinking water systems since 2008 before joining Dellavalle in 2018. He specializes in environmental services and private/public water systems. Martin is a Distribution Operator (D3) and Treatment Operator (T2) serving Merced, Madera, Fresno, Kings, and Tulare counties.

Pamela Proctor

Environmental Specialist
Field Tech Supervisor (Hanford)

Pam has been with Dellavalle Laboratory since 1996. She is an integral part of our food safety and regulatory compliance team. In addition, she is our Radiation Safety Officer and oversees our water collection training program. Pam specializes in private and public water systems and serves clients in the Fresno, Tulare, Kings, and San Luis Obispo counties.

Susan Villagran

Water Treatment Operator
T1

Susan attended San Joaquin Valley College where she earned an Associate of Science. She is a California Water Treatment Operator (T1) and a lead Sample Technician. Susan specializes in environmental monitoring including regulatory projects, drinking water systems and bacterial swabbing for packing sheds and other food processing industries. She serves clients throughout Kings, Tulare and Fresno counties.

Board of Directors

Agronomy

Environmental Services

Have a question? We're here to help.

Laboratory

Consulting Offices

Drop Off Locations

North County Copy & Parcel

Peninsula Messenger Service

Get in Touch