Key Personnel

The Allen & Shariff Team

Allen & Shariff’s people are the key to the firm’s ability to serve our clients well. Our highly skilled professionals are dedicated experts—people of integrity committed to helping our clients realize their vision, from start to finish. Learn more about the people that lead our talented team.

 

Zack Shariff, Chief Executive Officer, P.E., LEED® BD+C

Accreditations: B.S., Mechanical Engineering, University of Texas – 1981; Professional Engineer (P.E.) MD #21766 – 2006; LEED® Accredited Professional (LEED® AP) – 2006

Zack Shariff co-founded Allen & Shariff Corporation with William Allen. He holds a B/SC in Mechanical Engineering from the University of Texas and is a registered Professional Engineer as well as a LEED Accredited Professional. As the visionary entrepreneur of Allen & Shariff, his ingenuity, hard work, and perseverance created and sustained a successful, growing business for over twenty five years.


David C. Van der Vossen, Senior Regional VP of Engineering, P.E., LEED® AP, CGD

Accreditations: B.S., Business Management, University of Maryland – 1998; Professional Engineer (P.E.) MD #30756 – 2004; LEED® Accredited Professional (LEED® AP) – 2006; Certified GeoExchange Designer (CGD) – 2002; NCEES #25682 – 2004

As Senior Vice President, David Van der Vossen applies over 20 years of design experience to his projects. He is responsible for the overall technical design of his projects, as well as for the coordination of the work of the engineers, designers, and CADD operators on his team. He also consults with local regulatory agencies for design conformance of to regulatory standards and for conducting system analysis and comparisons with regard to economical and functional considerations. He is a member of the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. (ASHRAE) and International Ground Source Heat Pump Association (IGSHPA).


William “Bill” Jackson, Operations Manager Middle East

Accreditations: M.S., Environmental Science and Engineering – Virginia Tech; M.A., Urban Affairs

Bill Jackson is responsible for overseeing the operations of the Middle East office as well as ensuring that projects are delivered successfully by the ASC project teams. Bill has over 35 years of healthcare experience ranging from strategic inception to project turnover to the client. His experience includes work with architectural, project management, and consulting firms, as well as running his own project management company. He has served in key positions in healthcare planning and construction at two major academic medical centers and has consulted at over 50 hospitals, planning and putting in place over 4 million square feet of space.


David C. Price, Senior VP of Engineering, Pittsburgh, PA, P.E.

Accreditations: B.S., Mechanical Engineering, West Virginia University – 1996; Professional Engineer (P.E.) MD #12345, PA #12345

David Price has over 16 years of experience in mechanical engineering. David joined Allen & Shariff Corporation at their corporate headquarters in Maryland in 1997 and led the initiative to open an office in Pittsburgh. He is now a co-manager of the Pittsburgh office, and he manages the Pittsburgh mechanical group. David is responsible for project management and design of mechanical systems. He has completed new buildings and renovations including corporate office, higher education, multi-family, data centers, healthcare, industrial, retail, restaurants, hotel, transit, and non-profit spaces. As a Senior Vice President, David ensures that high quality and practical professional services are provided and that corporate goals, objectives, and plans are effectively executed.


Richard Bowser, VP of Engineering, Evans City
PA, 
P.E., CEM, LEED® AP

Accreditations: Associate in Specialized Technology in Architectural Design, Pittsburgh Technical Institute – 1980; Registered Professional Engineer (P.E.) PA#12345; Certified Energy Manager; LEED AP; Certified Sustainable Development Professional

Richard Bowser brings over 30 years of mechanical engineering experience to Allen & Shariff. His areas of expertise include managing projects from concept to completion, facilitating coordination between disciplines, conducting site surveys, making calculations for systems designs and equipment selection, technical writing, conceptual estimating, public presentations, and proposal preparation. Facility experience includes hospitals, assisted living, senior living, hi-tech, higher education, research, commercial, and industrial spaces.


Russ Sullivan, VP of Engineering, Evans City, PA, P.E., CEM, LEED® AP

Accreditations:
Bachelor of Architectural Engineering, Pennsylvania State University – 1980; Registered Professional Engineer (P.E.) PA#12345; Certified Energy Manager & LEED® AP

Russ Sullivan brings over 30 years of experience in mechanical engineering to Allen & Shariff. Areas of expertise include managing projects from concept to completion, coordination between disciplines, complex problem solving, site surveys, master planning, calculations for systems designs and equipment selection, technical writing, conceptual estimating, public presentations, and proposal preparation. Facility experience includes hospitals, assisted living, senior living, hi-tech, higher education, research, commercial, and industrial.


Donald R. Hocking, VP of Engineering, Salisbury, MD, P.E., LEED® AP

Accreditations: Need

Donald R. Hocking, P.E., LEEP AP has been promoted to Vice President and Manager of the Allen & Shariff Engineering’s Salisbury Office. Don has near 30 years of experience in the consulting engineering field and the breadth of his experience which serve him well in this position. Don has his Professional Engineer’s license in Maryland & Delaware, is an active member of ASHRAE, and is a LEED Accredited Professional.


Daryl Flood, General Manager of Operations, Construction Services

Daryl handles the day-to-day activities addressing staffing, project management, financial analysis, and business development for the construction division.

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