Meet Our Team
Get to know a little about us and feel free to connect with us at any time.
Executive Management Team
Tim Zeigler
Vice President
Team Member Since 1995
tim.zeigler@zeiglerfeed.com
Tim oversees the company’s specialty feed and government contract sales, as well as marketing and procurement. He graduated with an MBA from San Diego State University and holds a B.S. in Biology from Penn State University. He’s also been a member of the TEC Executive Program and Center for Creative Leadership.
Matt Zeigler
VP Operations / Process Engineer
Team Member Since 2002
matt.zeigler@zeiglerfeed.com
As VP Operations, Matt oversees all supply-chain operations, as well as the company’s global feed mill technology program. He attended Kansas State University and studied Food/Feed Extrusion obtaining his M.S in Agricultural Engineering from Penn State University. Matt has served as a Board of Director for the American Feed Industry Association (AFIA) and has served as Committee Chair for the AFIA Aquaculture Committee.
Tim Markey
Senior Technical Advisor
Team Member Since 1979
tim.markey@zeiglerfeed.com
Tim is the Senior Technical Advisor at Zeigler. With over 40 years of experience, Tim works closely with technical and sales personnel to strengthen Zeigler’s leadership in the industry. He began work with the company in 1979 after graduating from Shippensburg University with a B.A. in Biology. Since then, he has served a variety of roles in Nutrition, Quality, and R&D, and most recently as Director of Nutrition & Quality. Tim was a part of the team that developed the first shrimp grower and hatchery feeds at Zeigler, and he also participated in the establishment of Zeigler’s feed mill technology program.
David Dukes, CMA
Finance Manager
Team Member Since 2018
david.dukes@zeiglerfeed.com
David Dukes is the Finance Manager at Zeigler. David manages the company’s accounting and inventory systems and is responsible for financial reporting. He also oversees asset and risk management, as well as IT-related activities. David has his CMA accreditation and holds a B.S. in Accounting from Penn State University. He has been with Zeigler since 2017 and previously held the position of Controller.
Scott Snyder, Ph.D.
Director of Nutrition & Quality
Team Member Since 2010-2013 & 2018 – Present
scott.snyder@zeiglerfeed.com
As Director of Nutrition & Quality Assurance, Scott oversees nutrition, formulation and quality of all Zeigler products produced at our U.S. facilities, as well as our global partner facilities. He also plays a leading role in new product development and product improvement. Scott holds a Ph.D. in Animal Physiology from the University of Idaho, an M.S. in Aquaculture from the University of Arkansas at Pine Bluff, and a B.S. in Wildlife & Fisheries Sciences from Texas A&M University. His prior work included employment at large integrated catfish and trout producers, where his practical experience has given him a unique perspective on the value of high-quality aquaculture feeds.
Sales & Technical Teams
Aedrian Ortiz Johnson
Director of Global Aquaculture Sales
Team Member Since 2024
Connect on LinkedIn
aedrian.ortiz@zeiglerfeed.com
+52 622 109 5515
Aedrian leads Zeigler’s global aquaculture sales, bringing over 20 years of experience in shrimp hatchery operations, feed sales, and business development. With a deep understanding of key shrimp-producing markets, Aedrian is instrumental in driving Zeigler’s growth and market share worldwide. Aedrian holds a B.S., Engineer in Aquaculture from Instituto Tecnologico del Mar in Guaymas and a Technical degree in Mariculture from Kochi, Ken. Japan.
Mark Napulan
Asia Sales Manager
Team Member Since 2019
Connect on LinkedIn
mark.napulan@zeiglerfeed.com
+63-917-770-3603
Mark manages aquaculture sales activities in Asia with a focus on products for shrimp hatchery, nursery and maturation production. His background includes a strong mix of hands-on technical experience and business development work throughout Asia and the Middle East. Mark holds a B.S. in Fisheries from the University of the Philippines.
Tom Welch
Global Aquaculture Specialist – Finfish Feeds
Team Member Since 1999-2006 & 2010 to present
Connect on LinkedIn
tom.welch@zeiglerfeed.com
717-319-2503
Tom leads Finfish feed sales and has over 20 years’ experience collaborating with commercial fish farming operations raising trout, bass, tilapia, and a variety of marine species. Tom also works with state and federal hatcheries to support their stock enhancement efforts. Tom earned his B.S. degree from West Virginia University.
Dora Cota
Sales Representative – Shrimp Feeds, LATAM
Team Member Since 1999
Connect on LinkedIn
dora.cota@zeiglerfeed.com
717-778-5023
Dora oversees Shrimp feed sales throughout Latin America. She has over 25 years’ experience interacting with aquaculture clients worldwide and has extensive expertise in international trade and regulatory requirements. Dora holds a degree in Business Management from the Harrisburg Area Community College.
Priscilla Shirley
Sales Specialist – Pet & Lab
Team Member Since 1991
priscilla.shirley@zeiglerfeed.com
717-677-3017
Priscilla is responsible for Pet & Lab feed sales. With over 30 years’ experience, she has extensive knowledge of a wide range of species including tropical fish, reptiles, birds, small animals, and animals raised at zoos. Priscilla also oversees sales of lab animal diets and Zeigler’s Custom Manufacturing program. She is a member of AALAS.
Cao Khanh Ly, M.Sc.
Technical Sales Manager – Vietnam
Team Member Since 2016
Connect on LinkedIn
cao.khanhly@zeiglerfeed.com
+847-7301-1222
Ly oversees Zeigler’s shrimp hatchery, maturation and nursery product sales in Vietnam. Prior to joining Zeigler, Ly gained significant experience in both the commercial sector and at several research centers in Vietnam. He holds B.S. from Nha Trang University and an MSc from University of Agriculture, No 1 Ha Noi.
Tyler Hershey
Sales Operations Manager
Team Member Since 2017
Connect on LinkedIn
tyler.hershey@zeiglerfeed.com
717-677-3038
Tyler oversees internal sales operations and provides sales support in export markets with oversight responsibilities for Zeigler’s Vietnam-based entity. He holds a B.S. degree in Business Administration from Messiah University and comes from a family with deep roots and experience in the agriculture industry.
Peter Van Wyk, M.Sc.
Global Technical Sales Manager
Team Member Since 2015
Connect on LinkedIn
peter.vanwyk@zeiglerfeed.com
772-285-5768
As the Global Technical Sales Manager, Peter directs Zeigler’s customer field trial program and provides technical support to clients. Peter previously served as R&D Technical Manager and was responsible for managing the company’s research center in Florida (Z-ARC). He has over 40 years of experience in aquaculture, working throughout Latin America and Asia. He has pioneered work on shrimp production in high-intensity, low-salinity recirculating systems. Peter holds an B.S. in Marine Biology from UC Santa Barbara and an M.S. in Aquaculture from Auburn.
Ramir Lee
Regional Technical Manager
Team Member Since 2012
Connect on LinkedIn
ramir.lee@zeiglerfeed.com
+849-1985-3452
Ramir has over 30 years’ experience working in shrimp hatcheries and collaborating with clients in Asia and the Middle East. He applies his extensive knowledge in facilitating trials of new products, as well as providing on-site technical support for hatchery, maturation, and nursery operations. Ramir holds a B.S. in Fisheries from Bicol University in the Philippines and resides in Vietnam.
Diego Flores
Tech. Rep. Western Hemisphere Hatchery & Nursery Feeds
Team Member Since 2015
Connect on LinkedIn
diego.flores@zeiglerfeed.com
+505-8810-1115
Diego oversees technical support to shrimp operations in Latin America. Diego joined Zeigler after managing large prominent hatcheries and maturation facilities in Mexico and Central America. This experience equips him with an understanding of client challenges and needs in production systems. Diego holds a degree in Industrial Fisheries engineering from Insituto Technologico del Mar in Mazatlán.
Nguyen Xuan Sinh, M.Sc.
Technical Sales Representative in Vietnam
Team Member Since 2022
sinh.nguyen@zeiglerfeed.com
+849-455-6779
Sinh works alongside our customers in Vietnam where he is a Technical Sales Representative. He holds B.S. and M.S. degrees in Aquaculture from Nha Trang University. Sinh has over 20 years of experience in aquaculture research, having worked with a wide variety of species at multiple research centers in Vietnam.
Denis Lysander
Technical Sales Representative, Indonesia
Team Member Since 2024
denis.lysander@zeiglerfeed.com
+628116157338
Denis is responsible for technical sales support across Indonesia, bringing over 14 years of experience in technical sales, primarily in the livestock industry. Based in Medan, he travels extensively throughout the region to provide expert support.
Laura Horowitz, M.Sc.
Technical Representative – Aquaculture
Team Member Since 2024
Connect on LinkedIn
laura.horowitz@zeiglerfeed.com
570-290-1234
Laura serves as Technical Representative for Aquaculture and will provide technical support to clients in the US and Latin America. She also assists with research and field trials. Laura holds an M.S. degree in Fisheries & Aquaculture from Mississippi State University and a B.S. in Fisheries & Aquatic Sciences from Mansfield University of Pennsylvania.
Cheryl Shew
Inside Sales Specialist – Shrimp Feeds, US & Canada
Team Member Since 1996
Connect on LinkedIn
cheryl.shew@zeiglerfeed.com
717-677-3004
Cheryl collaborates closely with shrimp customers in the U.S. and Canada assisting with feed use and best management practices. Having worked with and visited a wide range of shrimp farms over the course of her career at Zeigler, Cheryl has developed a deep knowledge of the regional industry and its stakeholders. She holds a B.A. in Liberal Arts from St. Andrews Presbyterian College and a B.A. in History and Political Science from Mount St. Mary’s University.
Customer Service Team
Patty Miller
Customer Service Supervisor
Team Member Since 1986
patty.miller@zeiglerfeed.com
717-677-3005
Patty oversees Customer Service and has earned the trust of many customers during her tenure at Zeigler. She has a keen understanding of customer requirements and has expertise in coordinating a wide range of domestic and international shipments. Her knowledge of international shipping and regulatory procedures are critical to the company’s export success.
Marie Farace
Customer Service – Finfish
Team Member Since 2023
marie.farace@zeiglerfeed.com
800-841-6800 x 324
As Customer Service Representative for Finfish feeds, Marie works closely with our fish farming clients to ensure orders are managed according to customer needs. She provides solutions for customers and works to resolve any issues the customers may experience.
Kathy Gribble
Customer Service – Pet & Lab
Team Member Since 2024
kathy.gribble@zeiglerfeed.com
800-841-6800 x 322
Kathy is a newer member of our team and serves as our Customer Service Representative for Pet and Lab feeds. She is already building strong relationships with clients, ensuring their orders are managed smoothly and in line with their expectations. Kathy is proactive in providing tailored solutions and collaborates effectively to ensure a positive customer experience.