Our Studio Since 1989…

43 college, co-op and high school interns mentored

Yielded more than 5 million square feet of construction…and counting

Over 300 classrooms designed in the past 5 years

15 awards for historic campus projects

More than $200 million worth of PA public bid projects in last 5 years

Honored to have designed 17 projects for individuals with disabilities

9 inclusive play and sport projects since 2023

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Over 30 years of excellence in design…

HSA was founded in 1989 by friends and colleagues Phil Hooper and Mitch Shiles. The firm’s early success was through spearheading residential reconstruction projects in St. Croix, post Hurricane Hugo. In 2007, longtime HSA project architect Matt Heckendorn became Principal and the firm’s name subsequently changed to Heckendorn Shiles Architects. Our over thirty-year history has seen an evolution of project types, technology and sustainable initiatives while our commitment to deliver innovative and powerful designs has been constant.

Today we are a dynamic practice with diverse project types including interior, educational, therapeutic, sports facilities and ice rinks, community and municipal buildings, space and master planning, and art installation. We have received awards for our adaptive reuse, historic restoration and sustainable projects. 

To date, we have completed over 1100 design projects in 14 states.  Highlights of recent work includes the adaptive reuse of a former asbestos textile mill, renovations to Philadelphia landmarks including the Cira Centre and Wells Fargo Arena, the Philadelphia Flyers Practice Facility, guidance on a public art structure for the Papal visit to Philadelphia in 2015, plus 2 ice cream shops, a camp bunkhouse, 6 community ice rinks, and a garden headhouse.. Our talented team of architects and interior designers continue to champion new project types that push our portfolio, technology, and collective imagination.

Please enjoy our firm archive photos of staff favorite memories through the years.