Founder and Principal

Gerald Fink, PE & LEED AP

Gerald Fink exemplifies the modern engineer; practical, clever, and grounded in real world application. After making his name at Kling Lindquist, Jerry managed the Philadelphia office for the Boston-based RG Vanderweil in the mid-nineties. Realizing he had more to offer his clients, Jerry started his own company in 2000, bringing 30 years of engineering experience to his new firm. Since AEI’s inception, Jerry has led the company to become one of the leading names for MEP/FP engineering in the Philadelphia area. Through practical systems, smart solutions, and a genuine understanding of the client’s needs, Jerry has earned excellent reviews from architects, building owners, and project managers alike. He is known for recognizing the importance of client understanding and articulating his resourceful solutions to all of those working on the project. Jerry brings a real-world understanding to each project, having renovated several historic office buildings and homes of his own. He understands the value of money and creates systems that strive to eliminate both economic and energy waste. He has worked on a diverse variety of projects all across the Mid-Atlantic area, providing his expertise in master planning, design, and construction.


Derek Fink, PE & LEED BD+C

Derek is an eager and motivated mechanical engineer with diverse consulting engineering experience and a gift for relating and connecting with clients. After graduating from Drexel University with a Bachelor of Science in Mechanical Engineering (BSME) in 2007, Derek entered into the MEP consulting engineering field with McHugh Engineering Associates Inc. During his 7 years with the firm, Derek honed experience in mechanical and plumbing design, project management, construction administration, and commissioning through an expansive portfolio of projects. Additionally, Derek was involved in energy modeling, geothermal design, and the LEED commissioning process. Derek’s philosophy aligns with AEI’s commitment to provide cost effective, practical and sustainable designs pursuant to the client’s needs. Much like Jerry, Derek’s hand-on approach allows him to understand not only the theory behind the mechanical and plumbing systems used in the building trade industry, but also the installation and ongoing operations of these systems. His experience with energy management systems has helped clients with installation and commissioning of mechanical systems. His expertise also supports conversions and retro-commissioning of existing systems. Derek brings a fresh, progressive energy to AEI, offering inspired solutions and a keen perspective.

Senior Electrical Engineer

Tim Lewis

Timothy W. Lewis is a knowledgeable engineer with over thirty years of Engineering and Project Management experience in the building and marine construction in both the public and private sectors.  Tim enjoys engineering design and sees himself as a problem solver. Tim has designed electrical systems for a wide range of projects in different industries, including commercial, educational, industrial, pharmaceutical, healthcare, and transportation.  This broad experience enables him to understand and develop appropriate engineering alternatives to meet the requisite needs of the project with a focus on safety and energy efficiency.  He has performed electrical engineering studies including Short Circuit Analysis, and Arc Flash Reports. His design experience includes Medium and Low Voltage Power Distribution, Mission Critical projects utilizing multiple emergency generators, and uninterruptible power supplies for Control and Data Centers.  Tim also loves to show his artistic flair in lighting designs for signature and historic sites.

Plumbing and Fire Protection Designer

Joel Redinger, LEED AP

Joel Redinger joined AEI in 2003 upon receiving his Associates Degree in Engineering Technology. He also achieved his LEED accreditation and is a member of the American Society of Plumbing Engineers and NFPA. Joel’s responsibilities include plumbing and fire protection design, as well as project management. He has experience in a wide range of projects, including restaurants/commercial kitchens, residential, student housing, laboratories, data centers, and educational facilities.

CAD Technician

Joan Fagan

Joan Fagan joined AEI’s team in 2015. She brings 35 years of MEP and FP CAD operation experience. She specializes in electrical work. Joan attended the American Institute of Drafting in Philadelphia.

Electrical Designer

Jeff Ridgely

Jeff Ridgely joined AEI with more than 25 years of experience in electrical design and installation. His responsibilities include the design of commercial electrical systems, medium and low voltage power distribution, power and lighting design, fire alarm systems, security systems, and coordination and design electrical support for HVAC and plumbing equipment. Other project responsibilities include construction administration throughout the construction phase of projects. Jeff has experience in a wide range of projects, including multi-family housing, office fit outs, retail complexes, data centers, educational facilities (K-12 and higher education), healthcare facilities, pharmaceutical facilities, sport and gaming facilities, and restaurants and commercial kitchens. These efforts include both new and retrofit designs.