Our People. Our Strength.
The Onyx Valve Company is only as strong as its people, and our people have the most experience in the industry. Our people are experienced and helpful and work day in and day out to please our customers and manufacture best flow control products the industry has to offer. We encourage you to read through our profiles to get to know us.
David Gardellin, P.E., CEO
Co-founder and President of Onyx Valve Company, David is your primary technical resource for the measurement and control of slurries and other hard-to-handle fluids. He has been involved in valve engineering since starting as Chief Engineer at RKL Controls/Robbins & Myers in 1975. He holds a BSME from Drexel University and is a registered Professional Engineer in Maryland and New Jersey. He holds several patents related to pressure measurement and control, and is the author of numerous technical articles including chapters in the ISA Instrument Engineer’s Handbook and the Encyclopedia of Chemical Processing and Design.
Contact David at firstname.lastname@example.org
Chuck Witherow, Executive Director of National Sales
Extensive background in Supervison, Project Management, Sales and Trade Shows.
Formal training, schooling and experience in Electronic/Electro/Mechanical as well as customer service support.
Chuck manages and supports Onyx Valve Reps and Customers in many countries around the world.
His professional approach, communication and customer service skills and technical knowledge is a great asset to our company and customers.
Contact Chuck at email@example.com
Chris Reidl, B.S.M.E.T. Drexel University, Sales Engineer
A detail-oriented engineer, Chris invests the time and energy to ensure that your valves and isolator rings are correct in every detail and will perform exactly as you intend for every application. Chris is the contact for Spanish-speaking inquiries.
Contact Chris R. at firstname.lastname@example.org
Chris Schmidbauer, B.S.M.E.T. Drexel University, Draftsman/Designer
He is your first contact for certified drawings, submittals, outline drawings, I&M packages, and any other technical information or schematics related to Onyx Valve products. Excellent communication skills make him an easy person to contact.
Contact Chris S. at email@example.com
Howard Leisner, Controller
Howard is your first contact for AP, AR, credit approval, credit card transactions, wire transfers, customs issues, and any other financial assistance you may require.
Howard is also our Traffic Manager and can help coordinate trucking, air freight, import and export concerns.
Contact Howard at firstname.lastname@example.org
Mark Massimilla, Designer
Co-founder and Lead Designer, Mark is responsible for product design, research & development and the company’s manufacturing database. He has been involved in valve design since he started as a Designer at RKL Controls/Robbins & Myers in 1984.
Contact Mark at email@example.com
Robert Delfino, Draftsman/Designer
Rob is your first contact for certified pressure sensor drawing submittals and approval drawings. He is also in charge of processing all pressure sensor orders and the design of all specialty pressure sensor projects.
Contact Rob at firstname.lastname@example.org
Robert Schmied, Machine Shop Foreman
Bob is the machine shop foreman, and one of the founders of the Onyx Valve Company. His responsibilities include supervising the daily operation of the machine shop and final parts inspection. Bob was a machinist and shop foreman at RKL Controls/Robbins & Myers, and has over 30 years experience in the pinch valve industry.
Contact Rob at email@example.com