About Hydro-Dyne Engineering


Hydro-Dyne Engineering, Inc. is a leading manufacturer of exceptional quality screening and grit removal equipment for municipal and industrial water and wastewater facilities. Our focus is on building value for our customers through innovative separation equipment specialized for individual applications.

We are unique in our industry as one of the only manufacturers that also owns our patents and performs all equipment design, fabrication, assembly and testing in-house. We have complete control of our products from start to finish, and continuously improve and advance technologies through innovation and product testing. In fact, several of our recently patented designs establish the highest limits of screening in our industry.

Hydro-Dyne’s full line of water and wastewater screens, screening handling and grit removal equipment provide a superior level of functionality and reliability. Our stainless steel equipment is well-suited for the protection of water and wastewater treatment plants and industrial facilities with individual machine flow capacity ranging from 0.1 mgd (5 L/s) to more than 160 mgd (7,000 L/s).

Time-proven equipment and newly patented designs are constantly being manufactured as we continue to add to our list of satisfied customers throughout the world. The quality, performance, reliability and value of our products and services are unmatched in the industry.


With more than 2,000 installations worldwide, Hydro-Dyne Engineering is a dynamic, growth-oriented company with exceptional opportunities for exceptional people! Our team works together to design and manufacture innovative technologies and equipment to protect critical water and wastewater environments.

We are looking for people with the ambition to make something of their careers and to develop themselves into key contributors to our success. If you strive for excellence, want to contribute to sustainable environments around the world and enjoy a fast-paced, team-oriented culture, we invite you to learn more about us and our available career opportunities.

Available Opportunities


Protect critical water and wastewater processes and environments through custom-engineered equipment that provides exceptional quality, performance and value.


To develop and market the finest lines of equipment and custom solutions for the protection of critical water and wastewater processes to customers around the world through continuous innovation and excellence in design and manufacturing.


  • Innovation: We innovate to fuel our growth and solve challenges in our industry.
  • Excellence: We strive for excellence in all facets of our business to bring uncompromised solutions to market.
  • Contribution: We contribute to cleaner environments and sustainable development through industry leadership.
  • Integrity: We stand behind our products and are driven to do what’s right for our employees, our business partners and the environment.
  • Authenticity: We are honest, straight-forward and work tirelessly to create enduring partnerships.


1978 Wiesemann Engineering founded as a manufacturer of precision sheet metal and close tolerance machined components. Repair of worn and failed wastewater treatment equipment led to the design of new screening equipment and resulted in a number of patents still used in the water and wastewater industry today.
1984 The first through flow filter screen (present day Bull Shark Through Flow Screen) is manufactured and installed. The first of several patents for the Bull Shark screen are issued in 1985. Learn More
1988 The first center flow screen (present day Great White Center Flow Screen) is manufactured and installed. The first of several patents for the Great White screen are issued in 1989. Learn More
1991 The first in-channel grinder is manufactured and installed.
1992 The first in-pipe grinder is installed.
1996 Screen number 500 is installed.
1998 The first stepper screen is manufactured and installed. A patent for the design is awarded in 2000.
2001 Bruce Wiesemann retires and company name is changed to Hydro-Dyne Engineering Inc. under direction of Jay R. Conroy. Unique to the industry, manufacturing remains in-house with complete design and fabrication of all licensed equipment taking place at the factory. Significant investments are made in research & development, 3D CAD design software and remanufacture service of original screens. Grinder product line is discontinued.
2003 Screen number 1,000 is installed. Hydro-Dyne discontinues licensing and acquires all original patents and trademarks. Entire screening product line is later acquired from Wheelabrator/US Filter/Siemens, providing additional experience and records of hundreds of unique screening applications for the continued development of new equipment.
2005 The first wire mesh screen is patented and installed. This design paves the way for the first perforated panel screen to be installed in 2007.
2007 Operations are expanded with the purchase of a 20,000 sq. ft. office and manufacturing facility in Oldsmar, FL (Tampa Bay metropolitan area). The facility is solely dedicated to the design, production, and testing of screening equipment.
2008 Design and engineering converts to all 3D design.
2009 The first vortex grit trap and screw classifier is manufactured and installed.
2010 Screen number 1,500 is installed. The manufacturing plant is expanded for increased production, additional manufacturing equipment and employees. Additionally, the Hammerhead Onsite Screen Sizing (H.O.S.S.) system is developed. Learn More
2011 Hydro-Dyne’s Great White Center Flow Screen sets Screening Capture Ratio records at the National Screen Evaluation Facility at Chester Le Street STW Northumbrian Water. (93.25% for 2mm opening and 84% for 6mm opening)
2013 Screen number 2,000 installed.
2014 Operations expand again with the purchase of our current office and manufacturing facility in Clearwater, Florida (Tampa Bay metropolitan area). The 110,000 sq. ft. (10,000 m2) facility and ample land provide considerable room for continued growth.
Today Hydro-Dyne Engineering continues to introduce exceptional quality screening equipment and service to municipal and industrial water and wastewater markets. Time proven equipment and newly patented designs are constantly being manufactured as we continue to add to our list of satisfied customers throughout the world.
Tomorrow We will always be more than a screen supplier. We are inventors, engineers and manufacturers of exceptional quality stainless steel water and wastewater equipment. The highest quality equipment and service will be provided through our mission to retain complete control over our product line. All of our equipment will continue to be designed, tested and manufactured at our facility by the highest caliber employees.

Thank you for your interest in our company.

Do you have any questions or would you like more information?  We’d be happy to hear from you.

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