Who We Are

Allied Engineering and Design (AED) is a part of The Allied Resources Group which is owned by Dennis Zatlin. With over 30 years of experience, we provide superior, flexible customer service. Our team is made up of talented, experienced and detail oriented individuals – the best in the business. AED is committed to offering our workforce a rewarding work environment and encouraging professional growth. Additionally, we have been on the consulting side and owner side of the engineering business which provides us with a unique insight and full understanding of the requirements of both. Contact us today to learn more!

man at refinery

At AED our process is a partnership approach. We take the time, up front, to understand your business and then provide solutions to your projects and new ventures. Then, we implement our recommendations. When you work with us, you can rest assured that the health and safety policies and procedures at Allied Engineering and Design is at the forefront of everything we do.

Dennis Zatlin


Dennis has spent his career providing solutions to his clients throughout a variety of industries. As the President of the Allied Resources Group, which consists of 5 companies including Allied Engineering and Design, Dennis has embodied the philosophy that businesses are people-based.

He understands that investing in his employees, from the very beginning stages of their career, is an investment in the company’s future growth. Dennis started this quest in 2003 by purchasing Allied Resources. Based on the belief that he could scale the business through his strong relationships in the engineering sector, Dennis’ goal was to create a firm that was a cut above the rest.

Prior to purchasing Allied Resources, he spent 18 years in engineering consulting as the Vice President of Operations for a large firm, providing Engineering, Risk Mitigation and Project Delivery Services. It was during these 18 years that Dennis forged lifelong relationships with both clientele and engineering professionals within the petrochemical/refining, energy and heavy infrastructure industries.

Dennis also perfected his craft of marrying strong business principles with project execution and customer service. A strong advocate of helping those in need, Dennis continues to give back to the local community. He is an active Board Member of the Great Valley Community Organization and has been involved in several charities including: Bringing Hope Home, Toys for Tots and David Akers Kicks for Kids.

Dennis Zatlin

Curt Schellinger, P.E.

Vice President

Curt has 30 years of experience in heavy industrial engineering and is a registered P.E in Pennsylvania and New Jersey. Prior to joining Allied Engineering and Design, Curt has managed as many as 20 technical staff members for a private consulting firm. He has held Senior Project Manager and Mechanical/ Piping Department Manager positions, often at the same time.

Throughout his tenure, Curt has worked in the Petrochemical, Chemical, Refining and Process, Pipeline, Power, Transportation and Storage (gasoline terminals, truck racks, and tank farms) Industries. He has worked both on the consulting side and owner side of the engineering business which provides him a unique insight and full understanding of the requirements of both. Curt is well versed in system / equipment specifications, P&ID and PFD development, piping hydraulics, pipe stress analysis, scheduling, construction cost estimating, and a working knowledge of HVAC systems.

Curt Schellinger