We're a team of unique individuals, built on a foundation of service, respect, and diversity.

David Polatnick AIA


Read Bio

Contact David


It was David’s entrepreneurial spirit and enthusiasm that started PZS Architects. Early in his career he developed a network of contacts and a reputation for responsibility and consistency. It was natural that he would leverage this spirit into his own practice, teaming with Mario Zacharjasz to found the firm in 1993. David is known to the office and to clients as a dedicated and sensitive designer with a great eye for details and the ability to take every stakeholder’s needs into consideration. His honest passion for his work has endeared many clients with whom he has made lasting friendships. David’s more than 25 years of professional experience have included the planning and design of large-scale retail shopping centers as well as historic preservation and adaptive reuse projects, where he is particularly adept at breathing new life into old or outdated buildings. David received his Bachelor of Architecture degree from Temple University.

Mario Zacharjasz AIA


Read Bio

Contact Mario


Recognized by many as the face of PZS Architects, Mario Zacharjasz exudes an energy that inspires the firm and its clients. His passion for architecture and caring for others is evident in his thoughtful designs and extensive community and professional involvement. His 25 years of experience include an emphasis on educational, multi-family housing, and civic architecture for clients ranging from the School District of Philadelphia to the Army Corps of Engineers. Born in Cuba, Mario moved to the US when he was 3 and continues to maintain strong ties to his heritage and the local Latin American community.
Mario is committed to serving the Latino community in the region. He supports many non-profit organizations, and currently serves on the boards of The Kimmel Center, The Delaware River Waterfront Corporation and The Salvation Army of Greater Philadelphia. He is also on the Advisory Council for the Salvation Army Kroc Corps Community Center of Philadelphia. In each of these capacities, Mario focuses his energy on community sustainability, encouraging his partners, staff, and colleagues to do the same.
Mario also served as President of the Philadelphia Chapter of the American Institute of Architects, and was Chairman of the Board for the Greater Philadelphia Hispanic Chamber of Commerce, where he oversaw the creation of the first ever The State of Hispanic Business Report for the Greater Philadelphia region.  Mario holds a Bachelor of Architecture degree from Temple University. Mario has also completed post baccalaureate Business Executive Program at Dartmouth College's Tuck School of Business  and is a Goldman Sachs 10k Small Business Graduate.

Michael Skolnick AIA


Read Bio

Contact Michael


 A partner in PZS Architects since 1998, Michael guides the firm’s design philosophy. He quietly and efficiently encourages the office and its projects with his critical thinking and penchant for organization. His keen understanding of programming and planning gets every project off to a strong start. Whether working to further refine a design to meet a client’s needs or steering a project to proceed as planned, he is committed to high levels of client service and architectural excellence. No matter how big or small a design challenge, Michael recognizes the need to understand the details, and he instills the same careful thought in the entire staff. His 25+ years of professional experience have included pharmaceutical, institutional, and corporate projects, as well as designs for high-end multi-family residential projects. Michael earned a Bachelor of Architecture degree from Temple University and is a member of the Urban Land Institute and the Preservation Alliance of Greater Philadelphia.

Herb Schultz, IV LEED AP


Read Bio

Contact Herb


Herb has lived in Philadelphia for just under 20 years, a graduate of Philadelphia College of Textiles and Sciences (which has since evolved into Jefferson University). When he is not in the office or on a construction site, Herb is busy either cooking up some delicious BBQ or attempting, in vain, to keep up with his two daughters, Keely and Evie. 

Ryan Donohue, AIA, LEED GA

Project Architect

Read Bio

Contact Ryan


When not in the office crunching on a deadline, you can find Ryan at an Eagles tailgate, hiking or training for an upcoming marathon - his goal is to run a marathon in each state (three down, 47 to go). Ryan is always on the hunt for a new adventure, he loves happy hour and was Uber's first customer (he boasts a 4.8-star rating) so if you see him in your next Uber Pool make sure to say hi. Born and raised in the City of Brotherly Love, Ryan graduated from Philadelphia University.


Melissa Eckel, AIA, LEED AP

Project Manager

Read Bio

Contact Melissa


A true Renaissance woman, Melissa cooks gourmet dishes, gardens, hikes, goes camping, swing dances, makes mosaics and the list goes on... In her spare time, she makes pasta from scratch and watches old Disney movies on VHS.  Which one is her favorite?  Still a mystery!  In addition to her wide range of extracurricular activities, she has been heavily involved in the American Institute of Architects and created the Philadelphia Architecture Group Mentoring Program.   

Mike Silberman, AIA

Project Architect

Read Bio

Contact Mike


Mike brings an eclectic background to his practice of architecture. He has been a teacher, an archivist, and a builder. His experiences inform his interest in construction. Mike enjoys building furniture, and restoring his new (very old) Arts and Crafts style home in Mt. Airy. It's a true labor of love. As a true outdoorsman, Mike likes to ride his bike and paddle his handmade canoe on the Schuylkill and Wissahickon. 

Justin Nemshick, AIA, CPHC, LEED AP

Project Architect

Read Bio

Contact Justin


When not in office you will find Justin off the radar, kayaking and fishing, and enjoying an ice-cold lager.  Originally from Hazleton, PA, Justin was in the first graduating class of Architecture students from Marywood University.  His favorite movie is Peter Segal’s 1995 classic, Tommy Boy and his favorite meal is pepperoni pizza with peppers.  Justin honed his love of building at a young age when he started playing with Lego’s and later progressed into building his own ramps for skateboarding.  Lucky for us, his Evel Knievel stunts didn’t land him in the hospital, just in architecture school.  

Kim Hahn, Assoc. AIA LEED AP BD+C

Architectural Designer

Read Bio

Contact Kim


If the devil is in the details, than Kim is the angel of our office. She knows the IBC code like the back of her hand. When she's not in the office perfecting her Revit model or developing a more efficient workflow, you can find her hunting for her next-best local flea-market find or shopping for a new pair of shoes. Kim is a card-carrying member of the Free Library of Philadelphia, and as an avid reader she still checks books out. Kim moved to Philadelphia for college after growing up in rural PA. She graduated from Philadelphia University and has made the city her home ever since. Kim resides in Rittenhouse Square, and loves spending time in her garden. (Her tomatoes are delicious, and lucky for us, she is kind enough to share them with the rest of the office.)

Sarah Coppinger, RA

Project Architect

Read Bio

Contact Sarah


Sarah is a newly registered architect with a background in environmental advocacy. When she is not nerding out about Revit and Dynamo, she is doing DIY projects, watching sci-fi, reading fiction or tending to her vegetable garden with her urban farm cats. She bikes the Schuylkill River trail on her way home several times a week and improvises vegetarian meals for her friends. Originally from Philadelphia, she graduated from Temple University with a B.Arch.

Jed Morganstein

Architectural Designer

Read Bio

Contact Jed


Jed comes from a comprehensive background in the fields of art, design, and architecture. Born and raised in the Philadelphia area, he returned to the city a few years ago after living and working in first New York and then Chicago. When he isn’t in the office, he can usually be found drawing, painting, or seeking out classic pinball tables around the city.

Richie Storck

Architectural Designer

Read Bio

Contact Richie


A Philadelphian through and through, Richie was born here, went to school here, works here, and still enjoys everything this vibrant, historic, and culturally rich area has to offer. He has a Master of Architecture degree from Temple University and is experienced in a variety (and ever-expanding array) of project sectors. Like a lot of Philadelphians, Richie bleeds Eagles green and considers 2/4/18 a national holiday- the day the Eagles won their first Superbowl. The Atlantic City beaches are his preferred day-trip destination for relaxation and fun in the summer sun. 

Julian Espina


Read Bio

Contact Julian


Julian grew up in the suburbs but has made a home for himself in Philadelphia. He is working full time here at PZS while continuing his studies in Drexel University’s 2+4 Architecture program. Julian’s schedule keeps him busy, but in those precious moments of free time he enjoys experiencing live music with friends, as well as exploring the city in search of a new and interesting places to eat. His food adventures have taken him to an ever-growing list of interesting neighborhoods throughout the great city of Philadelphia and he looks forward to finding that next great little spot.

Glenn Giddings

Marketing Director

Read Bio

Contact Glenn


With a degree in Architecture and wide-ranging experience in the A/E/C Industry, Glenn leads the firm's marketing efforts with a high level of expertise and enthusiasm. In his spare time you might find Glenn with his toolbelt strapped on, working on another renovation project to his old house, watching the world go by from his front porch with one of his rescue dogs, or playing a mostly friendly game of tennis with friends. 

Courtney Zaborowski

Office Manager

Read Bio

Contact Courtney


When not bending data in one of her expert excel spreadsheets, you can find Courtney, a fan of good music, at live shows throughout the city or trying a new restaurant. As a founding member of The Restaurant Club she and 13 of her oldest friends dine at a new place each month - whether a James Beard Award-winning establishment or hole-in-the-wall neighborhood joint - they'll give it a taste. (Any club charter that calls for food, wine, and friends sounds like a club we should all join!) Courtney also enjoys running and exploring new places; she counts Prague and Alaska as two of her favorite destinations. The next stamps on her passport will be South Africa, Japan, and Iceland. Courtney is a Montgomery County native, and a graduate of West Chester University. (And if you ever need a restaurant recommendation she's probably the one to ask.)