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Gary M. Cappa 
President/Chief Executive Officer

Gary M. Cappa assumed leadership of United Inspection & Testing (UIT) in June 2002, as well as Heider Engineering Services in June 2015, merging the two into what is now known as United-Heider Inspection Group. He has been in the testing and inspection industry for 35 years and is committed to upholding the highest standards of quality in testing and inspection. Gary often utilizes his expertise in problem resolution, acting as liaison between the owner and contractor, expediting project completion, and answering quality control concerns of the project team and building officials. Gary has been instrumental in developing successful programs to improve the services of testing agencies and their interaction with local city jurisdictions. He has also provided expert witness testimony on various construction issues.

Martin B. Lowenthal
Executive Vice-President/ General Manager

Martin joined the team in 2014, and is taking the company to new heights with his expertise. Martin has more than 32 years of experience managing geotechnical engineering, construction materials testing and special inspection service organizations around the country. He has supported the Quality efforts of Owners, Developers and Construction Professionals on a diverse mix of private and public related projects. Some of Martin’s notable assignments have included the restoration of the Statue of Liberty, renovation of Dodger Stadium along with the construction of many high rise structures, commercial endeavors, health related facilities and educational institutions. He is responsible for the project management, administration and contractual obligations of our Southern California regional efforts.

Dennis W. Heider / R.C.E. 
Principal Engineer

Dennis has over 30 years of experience in the Soils & Material Testing Construction Industry and is the Principal Engineer of Heider Inspection Group. He is a 1978 graduate of University of Missouri, Rolla, where he obtained his Bachelor of Science Degree in Civil Engineering.

Kevin Ramirez 
Project Manager/ Business

Kevin has over 3 years of experience in the materials testing and inspection industry. He graduated with a Bachelor’s degree in Marketing and International Business from California State Polytechnic University, Pomona. As project manager/business development, Kevin oversees aspects such as new client development, bidding negotiations, project reporting, and works closely with upper management to ensure testing and inspections are delivered on schedule.

Jeremy "Jay" Winscher
Field Services Manager

Jeremy started with the company as a part time college student in 1997. Through his career he has gained extensive experience and knowledge in a full range of field inspections and quality assurance construction inspection, including soils and asphalt services. He holds certifications for Reinforced Concrete, Prestressed Concrete, Structural Masonry, DSA Masonry, Fire Proofing, and Structural Steel & Welding.

Luis Mondragon, E.I.T.
Staff Engineer/Project Manager

Luis is a graduate of California State Polytechnic University Pomona, he holds a Bachelor of Science degree in Civil Engineering. Since starting with UHI, Luis has completed training for Ground Penetrating Radar (GPR), Ff- Number Measurement (Floor Flatness), and ACI. He helps manage the UHI inspection services, oversees the field soil staff and assists UHI with project closeouts.

Steve Lindquist 
Laboratory Services Manager

Steve has been with the company for over 25 years and has been managing the laboratory testing procedures, maintaining the highest level of quality assurance.  Steve provides our clients with 100% satisfaction which has allowed United to become one of the premier material testing firms in Southern California.  Steve has been in the construction industry for over 25 years.  He maintains Laboratory accreditations, certifications and/or inspections with Division of State Architect, AASHTO Materials Reference Laboratory (AMRL), Cement and Concrete Reference Laboratory (CCRL), City of Los Angeles Department of Building and Safety, City of San Diego Building and Safety Division, and other various laboratory certifications.  Steve’s expertise provides United with the experience necessary to lead United’s testing laboratory.

Bridget Sherman 
Director, Project & Business Development

Bridget has worked in Project Development and Management in the A/E/C Industry since 2005. Her broad range of experience encompasses many aspects, including estimating, contract negotiations, project management, strategic business development planning and implementation, marketing direction and assessment, customer relationship management and team building. As our Director of Business Development, Bridget leads our highly acclaimed Project Management and Business Development teams in pursuit of projects that align with our firm’s strengths. Bridget builds mutually beneficial relationships with Civil Engineering firms, Private Developers, K-12 School and Community College Districts, Universities, Construction Management firms and Defense Contractors. She has a keen knowledge of working with several regulatory agencies (Division of the State Architect, OSHPD, CalTrans, USACE, NAVFAC, etc.) and how they affect the quality control scope of construction projects.

Grace Won 
Development Manager

Grace Won is an experienced Business Development Manager with a demonstrated history of working in the construction industry in various roles and projects. Prior to United-Heider, Grace held roles as a Designer, Design Manager, Business Development Manager and Project Manager for both private and public projects. Utilizing her experience in the AEC industry, Grace provides distinctive and unique solutions to providing solutions to her clients’ needs. Her attention to provide quality service and solutions leads to repeat clientele network.