With over 138 years of experience, H&H is a trusted, full-service infrastructure engineering firm known for solving complex challenges. Whether for infrastructure owners, contractors, or collaborators, our team is relied upon to deliver innovative, cutting-edge engineering solutions. From planning and design to construction, H&H excels in managing every stage of a project’s life cycle, ensuring success at every turn.

Our Downtown Philadelphia Office continues growing rapidly, providing superior engineering services across a wide range of projects. Current clients include SEPTA, Amtrak, NJ TRANSIT, NJDOT, and municipalities across the Mid-Atlantic.

In Philadelphia and throughout our firm, our team of world-class engineers is renowned for their expertise and is sought after globally. With deep knowledge of diverse structure types, they have a unique ability to navigate the intricate relationships between structural, mechanical, electrical, civil, and geotechnical components. This comprehensive understanding gives us a holistic perspective, allowing us to deliver innovative solutions that are both practical and forward-thinking.

H&H’s Corporate Mission is to deliver outstanding engineering solutions that improve the world’s infrastructure, bring value to our clients, and enhance people’s lives. Our commitment to our mission and staff enables us to attract and retain the industry’s top minds, ensuring we remain at the forefront of engineering excellence. As a result of this long term excellence, H&H has earned global recognition for our deep expertise, groundbreaking projects, and continued success.

H&H proudly supports WTS across our firm and locally through the Philadelphia Chapter.