"A commitment to deliver absolute client & partner satisfaction."

The HSC Executive Team’s ultimate goal is complete client success; this philosophy starts with top management and filters through all levels of the organization.

James Viner

President & CEO

As President & CEO, Jim Viner guides HSC’s strategic initiatives while collaborating closely with the executive team. He ensures that clients receive quality service by operating with a hands-on approach and connecting directly with owners and clients to help achieve their vision. Read More

Mark Heim, P.E.

Chairman of Board

As Chairman of Board, Mark Heim, P.E., acts in an advisory role to HSC by offering a perspective on strategic initiatives. Together with Jim Viner, Mark has helped the firm embark on significant business endeavors. The collaboration between the two remains an integral part of HSC’s future. Read More

Brian Hammond

Vice President

Brian has been in the construction industry since 1993. He received his Bachelor of Science degree in Construction Management from the University of Florida and is a LEED® accredited professional.Read More

Vikki Grinnan

Chief Financial Officer

Vikki Grinnan has served in many financial roles from small to large construction firms including Director of Project Accounting, Controller, and Chief Financial Officer. During her many years in the construction industry, she has developed internal and financial controls while managing all project accounting and cost control functions.Read More

Brian Ford

Director of Preconstruction

Brian Ford’s construction career began in 1988 working on many technically complex facilities in the healthcare and bio-pharma industries including R&D labs, process installations, and clean rooms. In his role as Director of Preconstruction, he manages design review, project budgets, and value engineering services.Read More

Ryan Kairis, CBCP

Director of Project Management

With over 25 years of construction experience, Ryan has a background in geotechnical engineering, facilities project management, and for the majority of his career, pharmaceutical and biotech construction management. Read More

Bill Graves

Group Leader, Higher Education & Healthcare

As Group Leader, Bill has more than 30 years of experience managing complex renovations and new construction projects for higher education, healthcare, and high-end corporate facilities. Through his proven leadership, Bill successfully fosters collaborative working relationships among the owner, design team, and trade contractors.Read More

Jon Huggins

Group Leader, Pharmaceutical & Biotechnology

For over 25 years, Jon has focused on pharmaceutical and biotechnology construction with an exceptional track record in achieving on-time and within budget project completions. He has managed significant projects valued in excess of $120 Million and has placed into service over 2 Million square feet of production space.Read More

Keith Fleetwood

MEP Group Leader

Since 1998, Keith Fleetwood has managed specialized and concentrated MEP systems construction. As the Group Leader of HSC’s MEP Department, Keith provides valuable guidance on the risk management of the MEP systems. He works closely with our Preconstruction and Construction Departments during the planning, purchasing, construction, and commissioning phases.Read More


Kim Esposito, CRIS

Risk & Safety Manager

As Safety & Risk Manager, Kim utilizes her diverse background in overseeing the risk management function. She has the legal, insurance, financial, and safety expertise necessary when considering the many facets of risk. Her responsibilities include Jobsite Safety, Property & Casualty, Contractual Risk Transfer, OSHA Guidelines, Strategic Planning, Indemnification, Contract Negotiations and Claims Management. Read More