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 email@example.com
Chuck Witherow, Vice President of 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 firstname.lastname@example.org
Monica Handley, Sales Engineer
Technical Sales: A graduate from Rutgers University School of Engineering, Monica is happy to step into her role as Sales Engineer at Onyx Valve. While in school Monica took advantage of every available opportunity, trying her hand at everything from HVAC, commercial architecture, costume design, fundraising, songwriting, customer service, cutting vegetables into perfect cubes, and sustainable energy design. Monica can provide you with pricing and technical support to apply pinch valves, isolator rings, or duckbill check valves for almost any conceivable application.
Contact Monica at email@example.com
Elizabeth A. Salmi, Sales Engineer
Technical Sales: Elizabeth Salmi is thrilled to join Onyx Valve Co. as their newest Sales Engineer. A Bachelor of Science degree in Applied Sciences Engineering with a focus in Environmental Engineering, combined with her experience in process control make her the ideal contact person to help you select the right valves and pressure measuring instruments for all of your environmental applications like storm water and waste water. Her goals in life are to sell all the valves and meet Dolly Parton.
Contact Elizabeth at firstname.lastname@example.org
Meredith Foster, Expediting and Traffic
Contact Meredith to check order status and for help arranging shipments to or from Onyx Valve Co including ground freight and expedited freight options.
Contact Meredith at email@example.com
Taylor Mahon, Purchasing Agent
Taylor Mahon is your key contact for Outside Purchasing at Onyx Valve Co. With years of experience in customer service and sales, Taylor is quick to purchase instrumentation and raw materials necessary to complete orders, verify their specification and schedule incoming deliveries, organize any and all documentation, and compare receipts to ensure correct and on-time delivery for final products. If you’re an Onyx supplier, Taylor can clarify any unclear items to make certain we’re getting what’s best for the customer.
Contact Taylor at firstname.lastname@example.org
Chris Schmidbauer, Engineer, B.S.M.E.
Chris Schmidbauer is responsible for valve design. He is also your contact person for submittal packages and any other documentation related to pinch valves and duckbill valves.
Contact Chris S. 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
Howard Leisner, Controller
Contact Howard for issues related to credit approval, wire transfers, customs and special payment terms and conditions.
Contact Howard at email@example.com
Katherine Foster, Accounting
Katherine is your first contact for AP, AR and credit card transactions.
Contact Katherine 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 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 firstname.lastname@example.org
Dave Headley, Assembly Foreman and Co-founder
Dave has over 30 years’ experience building pinch valves. He has assembled, installed and repaired valves with pneumatic, electric and hydraulic actuators and positioners, and has assembled, calibrated and repaired pressure gauges, switches and transmitters.