Our greatest asset is our people. Our staff of architects, engineers, parking specialists and administrative professionals lead the firm, providing project management and technical expertise, and exemplify our mission and values.
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- Todd J. Helmer, PE, SE
- CEO
- Philadelphia
Todd serves as Chief Executive Officer of THA Consulting, Inc. In his role as CEO, Todd is responsible for the overall vision and strategic direction of the company, as well as client relationships, business management, financial management, and overall corporate operations.
Todd has over 30 years of experience in the field of planning, engineering, and architecture. He specializes in the planning, design, and restoration of mixed-use parking structures. Todd's expertise is focused on parking planning and the functional designs of mixed-use parking structures for higher education, healthcare, as well as many other market sectors.
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- Janice J. Haahs, MBA
- Executive Chairman / CFO
- Philadelphia
Janice is responsible for the firm’s financial management, including strategic financial planning, accounting system management, financial reporting and record-keeping. In addition, serving as CAO, she leads the Human Resources, Information Technology and Business Management departments. She and her staff seek to provide each employee with the resources they need to reach their full potential, both professionally and personally. Janice also serves as an officer for the Seoul National University Alumni Association.
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- Jim Zullo, AICP, PP, LEED AP, CAPP
- President
- New Brunswick
Jim serves as President for THA Consulting. Prior to joining THA Consulting, Jim served as Senior Director of Real Estate and Economic Development for New Jersey Transit, the third-largest transit agency in the United States. In this position, Jim was responsible for the management of the agency’s real estate assets, property acquisitions, and sales, retail leasing, maximizing the revenue potential from these assets, undertaking transit-oriented development initiatives, and managing the agency’s 25,000 space commuter parking system. Jim has also served as Vice President of The New Brunswick Development Corporation, and Executive Director of the New Brunswick Parking Authority.
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- Mike Martindill,
- Principal
- Atlanta
In 2006, Mike launched and managed the Atlanta office of THA. Today, he leverages over 35 years of expertise to deliver cost-effective, user-friendly parking planning, design, and restoration engineering solutions. While his work spans virtually every vertical market, his primary focus remains serving clients throughout the South and Southeast.
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- Kevin W. Carrigan, PE, SE, QPSI
- Senior Vice President
- Philadelphia
Kevin serves as Senior Vice President, leading a diverse team of engineering professionals and guiding the organization's technical strategy. With a focus on quality, and innovation, he fosters a culture of continuous improvement while delivering solutions that support business growth and client success. In addition, Kevin leads the firm’s restoration and asset management service line.
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- Chris Bieter, PE
- Vice President of Operations
- Philadelphia
As Vice President of Operations, Chris plans and oversees the day-to-day operations and delivery of THA Consulting professional services. Chris serves as a Project Manager on a number of new design and restoration projects. His expertise is in providing leadership and guidance to clients and project teams throughout the design and construction process for parking design and engineering.
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- Javier Sanchez, AIA
- Vice President of Florida Operations
- Miami
As Vice President of Florida Operations, Javier leads and oversees project delivery, client service, and business growth throughout the region. He works closely with clients and project teams to ensure exceptional results, operational excellence, and long-term partnerships.
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- Peter Sadowski
- Vice President of Quality & Risk Management
- Philadelphia
As Vice President of Quality and Risk Management, Pete leads the development and implementation of quality assurance and risk management programs across the firm. He promotes a culture of excellence, continuous improvement, and proactive risk mitigation to support successful project delivery and client satisfaction.
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- Sun-Hee Hwang, PhD, PE
- Senior Engineer/Quality Assurance
- Philadelphia
Sun-Hee provides quality assurance for THA Consulting's parking and mixed-use projects. He had 30 years of experience specializing as a structural engineer, and has extensive expertise with all kinds of structural systems including pre-cast, post-tensioned, filigree, cast-in-place reinforced concrete, and structural steel structures. Sun-Hee has worked on many complex parking and mixed-use projects, for clients including the University of Pennsylvania, the U.S. Department of Veterans Affairs, and the Union Station Redevelopment Corporation.
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- Jean Choi,
- Human Resource Manager
Jean is responsible for ensuring that the human resources strategic goals and mission of human resources is met, through developing and managing a full range of human resource management functions, including recruiting, training, staff development and performance management, benefits administration, and compliance management.
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- Jordan C. Rappin, PE
- Director of Engineering
- Philadelphia
As Director of Engineering, Jordan Rappin plays a pivotal role in developing THA's engineering team. His 17 years of experience and expertise reflect in his consistency, quality of work, and effective leadership. Jordan utilizes his knowledge of structural systems, parking designs, and management to deliver successful mixed-use and parking structure projects.
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- Byungjin Jung, PE
- Director of Structural Design
- Philadelphia
As Director of Structural Design, Byungjin leads the firm’s structural engineering practice, overseeing the planning, design, and delivery of structural solutions across a diverse portfolio of projects. He provides technical leadership, mentors engineering staff, and helps ensure quality, innovation, and excellence throughout the organization.
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- Christina Haahs, MBA
- Director of Marketing
- Philadelphia
As Director of Marketing, Christina provides strategic leadership for the firm's marketing and communications efforts, driving initiatives that elevate brand awareness, support business growth, and strengthen client relationships. She leads the marketing team, oversees key pursuits and campaigns, and ensures alignment between marketing strategies and the firm's business objectives. Her leadership plays a vital role in advancing the firm's reputation and market position.
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- Namhyun Kim
- Design Department Manager
- Philadelphia
Nam leads the design department by overseeing project delivery, staff development, quality standards, and resource planning. He is responsible for managing team performance, fostering collaboration, supporting client relationships, and driving technical excellence to achieve business and project objectives.
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- HuYoung Kim
- Senior Project Manager
- Philadelphia
As Senior Project Manager, HuYoung, based in our Philadelphia office, leads the successful delivery of complex healthcare, institutional, public, and private-sector projects. He builds strong client relationships, guides high-performing project teams, and ensures projects are delivered with excellence from planning through completion. HuYoung is responsible for project execution, financial performance, risk management, and staff development, while also contributing to the firm's strategic growth, operational effectiveness, and long-term success.
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- Reginald Piggee, RA, NCARB
- Senior Project Manager
- New Brunswick
Based in our New Brunswick office, Reggie serves as Senior Project Manager, where he leads project teams, strengthens client relationships, and delivers successful outcomes for clients and the firm. He oversees project execution, financial performance, risk management, and staff growth, while helping advance operational excellence and supporting the firm's continued growth and success.
