Who We Are

Allison Ong Shreffler, Architect + Designer

Allison Ong Shreffler was born and raised in Northern New Jersey, and attended the Pennsylvania State University where she received her Baccalaureate Degrees in Science and Architecture. She interned at a mid-sized architectural firm in North Jersey and was hired full time upon graduation. She was the design lead for many projects early in her career, which included residential, commercial, religious, and transportation projects. She was promoted as the Project Manager and Architect for multiple projects upon receipt of her Professional license.

In 1995, Allison founded AOS Architect where she provided architecture, interior design, and construction administration services to both residential and commercial clients. She simultaneously co-founded a Design/Build company servicing the restaurant and hospitality industry. Her designs and vision were instrumental in elevating the company’s full service reputation by providing a “signature” architectural brand for each establishment.

Allison participated in many community organizations and was appointed to the planning board by the Mayor of River Edge for several years. Her recommendations for appropriate planning, zoning, and aesthetic issues were sought after and requested throughout the community.

Allison’s expertise as a Professional Architect and interior designer encompasses the many facets of architecture, design, and construction. She provides her clients with designs that are delicate balance of aesthetics, function, cost, constructability, and sustainability.

In 2008, she relocated with her family to Harrisburg, Pennsylvania and was the Principal Architect in Charge at an Architecture/Civil/Survey Engineering firm for several years before reestablishing her own architectural and interior design practice in Central PA. Here, she continues to serve her NJ and PA clients as well donating her time to speak and participate in Junior Achievement Symposium and Junior Achievement STEM mentorship programs, is a contributing editor for Central Keystone Living Magazine, and is an active member of the Home Builders Association of Metropolitan Harrisburg, American Institute of Architects, American Society of Interior Designers, and National Kitchen and Bath Associations.

In 2021, Allison Ong Shreffler, Architecture & Design LLC received certification as a Small Business, Women Owned, and Diversity Owned Business. 


Rebecca “Becky” Wirth, Design Assistant

Becky graduated from the Art Institute of York, with a Bachelor Degree in Interior Design. Becky began interning with the firm and was hired as a Designer upon her graduation. She is always ready to help our clients solve their design challenges, from visualizing design concepts, to selecting colors, finishes, furnishings and accessories. She is a joyful addition to the Design team. She enjoys spending her free time with her husband “Reg” and fur baby Lillie. 


Matthew Shreffler, Architectural Intern

Matthew graduated from The Pennsylvania State University with a Bachelor Degree in Architecture. He began interning with the firm since graduating from Central Dauphin High School. His high tech education and knowledge with laser printing, 3D modeling and visualization is a welcome skill that enhances our customer’s experience. He is an active member of Harrisburg Young Professionals and currently serves on the Arts and International Committee. He continues to explore his passions in Art, Architecture, music, and sports. He also enjoys culinary adventures and loves to travel.