Better Solutions for Water & Wastewater Since 1973

Celebrating over 50 years of providing consistent, value-based, and high-quality solutions, Koester represents industry leading manufacturers of water and wastewater treatment and pumping equipment. Koester specializes in applications, design, operations, parts, maintenance, sales, technical support and service.

Offering Comprehensive Solutions
• Expert engineering staff
• Integrated industry involvement
• In-house customer care
• Knowledgeable sales force
• Support before, during and after the sale
• Fast response by field service technicians
• Factory certified technicians

Our Founder - Donald J. Koester

Koester Associates was founded in 1973 by Don Koester. His commitment to truth and loyalty, as well as his technical competence and keen eye for details, is and has always been the foundation of Koester Associates. His guiding principles then remain ours today. Koester Associates is: Caring. Knowledgeable. Loyal.

Our Valuable Team Members

Mark Koester
Chief Executive Officer

Mark Koester has been active in the water and wastewater industry in Upstate New York for over 30 years. Mark has a degree in Sanitary Engineering and retains leadership positions in the New York Water Environment Association (NYWEA) and New York Rural Water Association (NYRWA). He remains active in the American Water Works Association and local Water Works affiliates.

Gregg Palmer

Gregg has successfully led strategic sales and business development efforts in the municipal market for over 20 years. He began his career with Poly Processing Company, and as National Sales Manager he developed a successful sales and marketing strategy that led the company to become an industry leader in chemical storage tanks.

Gregg joined Koester in 2013, further increasing the company’s ability to offer clients comprehensive solutions to their community’s water and wastewater goals. In 2022, Gregg was promoted to President and continues to use his talents and vision to ensure Koester remains a leader in our industry.

Gregg is an active member NYWEA.

Noelle Markle
Chief Operating Officer

Noelle is a detail-oriented, leadership-driven professional with a diverse background. Bringing over 15 years of experience in administrative and executive business management, Noelle provides an attentive, strategy-driven approach to our team. Her emphasis on mentoring and incorporating role models guarantees success and growth.

Noelle is excited to bring her talents and expertise to the Koester Associates family. While fairly new to the water and wastewater industry, one of her strengths is being able to smoothly and efficiently transition her skills as she expands her knowledge in this field.

Michael Ademovic
Senior Vice President

Michael Ademovic joined the water and wastewater industry in 2013, when he joined his family’s business Burgh Schoenenberger Associates. Mike has been working with industry professionals on a variety of instrumentation, control, and pumping system and process projects. Mike’s attention to detail and experience on equipment offers end-users, contractors, and engineers’ confidence in providing effective solutions. Mike is heavily involved with Western NY and Genesee Valley water works affiliates.

Jacob Scherer, P.E., 
Senior Vice President of Downstate Operations

Jacob has 25 years of experience in the water and wastewater industry with increasing levels of responsibilities from engineering, sales and ownership management.  Jacob earned his bachelor’s degree in Civil Engineering from Rochester Institute of Technology in 1988 and holds a master’s degree in Business Administration from St. John Fisher College.

He has been newly appointed as Senior Vice President of Downstate Operations and will be working out of the Kinnelon, New Jersey office.  He is a licensed P.E. in both New York and Pennsylvania.

Sales Team
Email Sales

Rich Suriano
Sales Engineer – Eastern NY

Taylor Bottar, PE.
Sales Engineer

Jon Arneth
Vice President Downstate Sales

Bill Rourke
Sales Consultant

John O’Connell
Aftermarket Specialist

Harold Anger
Sales Consultant

Syd Harris
Sales Engineer

Inside Sales and Technical Support

John Revette, P.E., BCEE
Inside Sales Engineer

Kate Hurrle
Senior Project Manager

Rick Buckles
Technical Resource Engineer

Kyle Buckles
Bidding Coordinator

Casey Austin
Inside Sales Representative

Benjamin Girard
Inside Sales Representative

Cassandra Ambrose
Project Manager

Parts and Service
Email Parts
Email Service

Eric Koester

Eric Koester
Aftermarket Sales Manager

Rob Samuels
Field Operations Manager
NYSDOH IA-SW/GUI Filtration Plant, D-Distribution System

Daniel Jean
Service Supervisor
NYSDEC Certified 4A Wastewater Operator

Chris Frechette
Service Manager

Liz Markle
Project Coordinator

Heidi DuSell
Service Coordinator

Sarah Nickal
Parts Coordinator

Erika Sumner
Administrative Assistant – Aftermarket Sales

Jessica Widrick
Administrative Assistant – Parts & Service

Bob Gillette
Field Service Technician

Brian Link
Service Specialist
NYSDEC Certified 4A Wastewater Operator

Jason Miller
Field Service Technician
NYSDEC Certified 2A Wastewater Operator

Bryan Osborne
Field Service Technician

Chris Siddall
Field Service Technician

John B. West
Field Service Technician

Phil Opera
Field Service Technician
NYSDEC Certified 3A Wastewater Operator

Luke Hopkins
Field Service Technician

Kodi Bush
Field Service Technician

Finance and Administrative Support

Mary Lou Pace
Finance Consultant

Shelley Hausser
Finance Associate

Pamela Leary

Michele Ficarra

Alison Hillenbrand
Administrative Assistant