Sage Altenhofen was raised in Philadelphia and received a Bachelor of Architecture degree at Carnegie Mellon. Her professional curiosities include new project types and program elements with special demands. Outside the studio, Sage explores various artistic mediums and is learning to make stained glass. 

Key Projects 

Bus & Bike Shelters, Princeton University, Princeton, NJ 

Class of 1986 Fitness & Wellness Center, Princeton University, Princeton, NJ 

Nylon Capital Center, 9th Street Development Company, Seaford, DE 

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Rebecca Braun has over ten years of experience practicing architecture, applying her design, communication, and engagement skills to various arts, civic, and higher education projects. She grew up in New Jersey and received a Bachelor of Arts in History and a Master of Architecture from the University of Michigan. Rebecca has served as an invited juror for design reviews at the University of Pennsylvania, the University of Michigan, Temple University, and the New Jersey Institute of Technology. 

Key Projects 

Class of 1986 Fitness & Wellness Center, Princeton University, Princeton, NJ 

Forman Arts Initiative, Philadelphia, PA 

Library Playspaces, Free Library of Philadelphia, Philadelphia, PA 

Sam M. Walton School of Business Planning Study, University of Arkansas, Fayetteville, AR 

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​Kirah Cahill is from Lower Merion, Pennsylvania. She completed her undergraduate degree at Indiana University and her Master of Architecture at the University of Pennsylvania. Before joining DIGSAU.  Also, Kirah teaches as an online instructor advanced computational design to architects, product designers, and visual effects artists. 

Key Projects 

Maple Hill North Student Housing, University of Arkansas, Fayetteville, AR 

Pasquerilla Spiritual Center Feasibility Study, Pennsylvania State University, State College, PA 

Kate Czembor has more than twenty years of experience as an architect. Originally from Poland, Kate moved to New York City in her teens and pursued her architecture degree at Cooper Union. She has a deep interest in craft in contemporary building and a breadth of experience with higher education clients, including Princeton, the University of California, and Yale. Kate is a member of the AIA Philadelphia Technology + Innovation Committee and a frequent guest critic at design schools in the Philadelphia region.  

Key Projects 

All School Commons, Phase I, Germantown Friends School, Philadelphia, PA 

Class of 1986 Fitness & Wellness Center, Princeton University, Princeton, NJ 

Maple Hill North Student Housing, University of Arkansas, Fayetteville, AR 

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Olivia Davis was born in East Texas and raised in Philadelphia, where she received a degree in Marketing from Temple University. At DIGSAU, she is involved in a wide range of marketing and development initiatives, including awards, project photography, new business pursuits, and creating compelling visual stories about architecture. Outside the studio Olivia explores biking, cooking, knitting, and darkroom photography. 

Nicole is from Brooklyn, New York. She received her Master of Architecture degree from Yale University, where she was a Teaching Fellow for the Yale Building Project, an exemplary design-build initiative. She received a Bachelor's degree from Mount Holyoke University in Art and Architectural Studies. Her interests include materials science, sustainability, graphic design, and printmaking.

Fran came to Philadelphia from Saint Paul, after receiving a Master of Architecture degree from the University of Minnesota. He holds a bachelor's degree in civil engineering from Princeton University and was a recipient of Gensler’s Rising Black Designer Scholarship. He brings a deep interest in sustainable and regenerative architecture, community engagement, and open source design to the firm. 

Key Projects 

Comcast Lift Zones, Philadelphia, PA 

Jules Dingle is a designer, teacher, and founding partner of DIGSAU. He is noted for his ability to transform even the most practical functions into symbolic and inspirational gestures. His projects have been recognized for unexpected, novel, and effective solutions to complex design challenges and budgetary constraints. Jules is a Professor of Practice at the University of Pennsylvania Weitzman School of Design where he leads the Master of Science in Design with a concentration in Preservation. He has served as a guest critic and lecturer at numerous design schools and a board member of AIA Philadelphia and AIA Pennsylvania.  

Ryan Drummond has more than fifteen years of design and construction experience working with civic, higher education, and mixed-use projects in Pennsylvania, New Jersey, Delaware, and New York City. He received an architecture degree from Temple University and a Master of Architecture from Cornell University. In addition to practicing architecture, Ryan has taught design at several local universities and also has been a longtime exhibitor at various galleries in and around Philadelphia. 

Key Projects 

Center for Advanced Technologies, Bucks County Community College, Bristol, PA 

North Wilmington Free Library, Wilmington, DE 

1201 Normandy Mixed Use Project, Ensemble/Mosaic, Philadelphia, PA 

Jamie Ferello pursued his Bachelor of Science in Architecture and Master of Architecture degrees in his hometown at the University of Cincinnati. His architecture career has included teaching at The University of Cincinnati and Temple University and freelance writing for the Architects’ Newspaper. At DIGSAU, he applies his interest in building science and technical detailing to a variety of cultural, civic, and higher education projects and through his involvement in the firm’s Technical Working Group. Outside the office he is an avid woodworker.  

Key Projects 

Hospitality Institute, Montgomery County Community College, Blue Bell, PA 

Maguire Art Museum, St. Joseph’s University, Merion, PA 

Nylon Capital Center, 9th Street Development Company, Seaford, DE 

Wexler Art Gallery, Philadelphia, PA 

Caitlin Feroce grew up in Philadelphia and studied architecture at Philadelphia University. A generalist by nature, Caitlin developed her design skills working on community-based, civic-minded projects for two Philadelphia firms prior to joining DIGSAU. Caitlin currently volunteers with ACE Philadelphia as a mentor to high schoolers exploring pathways in architecture and engineering. 

Key Projects 

Homewood Park Fieldhouse, City of Pittsburgh, Pittsburgh, PA 

North Wilmington Library, State of Delaware, Wilmington, DE 

Danielle Fleischmann studied architecture at Rensselaer Polytechnic Institute with a concentration on Environmental Engineering in her home state of New York. At DIGSAU, she applies her interest in sustainability, zero-waste practices, adaptive reuse, and environmental design to a range of projects for academic institutions. Danielle is a Director-at-Large for the AIA Philadelphia chapter and co-chairs the Committee on the Environment’s Policy and Advocacy subcommittee. 

Key Projects 

All School Commons, Germantown Friends School, Philadelphia, PA 

Siegel Center Renovations, Sarah Lawrence College, Bronxville, NY 

Nurture Nature Center Renovation & Expansion, Nurture Nature Foundation, Easton, PA 

Harris Ford has practiced architecture for more than seventeen years, working on projects in the United States, Europe, and Asia. Originally from Thailand and New York state, Harris received a Bachelor of Architecture from Princeton University and a Master of Architecture from Yale University. At DIGSAU, he leads complex commercial, institutional, and multi-family residential projects. Community outreach, adaptive re-use, and social justice are driving themes for his practice as an architect. 

Key Projects 

CP Furniture Studio, The Challenge Program, Wilmington, DE 

The Clay Studio, Philadelphia, PA 

Town Branch Housing, Blue Crane Development, Bentonville, AR

Jeff Goldstein is a designer, community advocate, and founding partner of DIGSAU. With a background in ecology and environmental studies, Jeff is an expert in sustainability and an advocate for good design in the service of vulnerable communities. He is a longtime volunteer with the AIA Philadelphia’s Committee on Design, and in 2022, served as chapter president. He currently serves on the Advisory Council of the Community Design Collaborative where he advocates for empowering communities through design excellence. He shares DIGSAU’s experience in conferences and lectures including the Monterey Conference on Design, AIA Iowa Design Conference, and AIA Arkansas, among others. 

Aaron Jezzi has more than sixteen years of experience at DIGSAU working on many of the firm’s pivotal projects for arts, civic, and higher education clients. Aaron studied ancient philosophy at St. John’s College and received a Master of Architecture from the University of Pennsylvania. He brings his background in the liberal arts to the search for unifying ideas in architecture and leans heavily on an interdisciplinary approach to solving architectural and urban design challenges. 

Key Projects 

Camden Preparatory High School, Uncommon Schools, Camden, NJ 

Kelly Writer’s House Renovation, University of Pennsylvania, Philadelphia, PA 

Maguire Art Museum, St. Joseph’s University, Merion, PA 

PPR Residence Hall, Swarthmore College, Swarthmore, PA 

Elizabeth Kahley has practiced architecture for more than sixteen years, working primarily with higher education and institutional clients. An effective listener with rigorous attention to detail and client needs, Elizabeth is consistently commended for her ability to bring disparate voices and disciplines into alignment in service of a common project vision.  She has applied strong leadership and analysis skills to a wide range of program types including arts and maker spaces, academic buildings, recreation facilities, and engineering research laboratories. A native of Virginia, Beth received a Bachelor of Science in Systems Engineering and a Master of Architecture from the University of Virginia. She is a committed mentor and advocate for emerging design professionals and a frequent guest critic for architectural studios. 

Key Projects 

Class of 1986 Fitness and Wellness Center, Princeton University, Princeton, NJ 

Sam M. Walton School of Business Planning Study, University of Arkansas, Fayetteville, AR 

Tyler School of Art and Architecture Renovation, Temple University, Philadelphia, PA 

The Wetlands Institute, Stone Harbor, NJ 

Linfan Liu grew up and trained as an architect in China. After receiving a Master of Architecture degree at the State University of New York at Buffalo, she continued to complete a PhD in Architecture at the University of Pennsylvania. Her unique experience in material manufacturing and historical preservation sharpens her senses of materiality and craftsmanship in design and construction. In addition, Linfan writes for multiple journals and is an overseas editor for RUYI Magazine. 

Key Projects 

Concept Design, Asian Arts Initiative, Philadelphia, PA  

Center for Intercultural Engagement, University of Delaware, Newark, DE  

The Clay Studio, Philadelphia, PA 

Siegel Center Renovations, Sarah Lawrence College, Bronxville, NY 

Jesse Mainwaring has practiced architecture for more than fourteen years leading projects with art and culture, higher education, and urban development clients. A Philadelphia native and erstwhile furniture maker, Jesse studied anthropology at Penn State before pursuing a Master of Architecture degree at the University of Texas at Austin, where he researched building performance at the school’s Center for Sustainable Development. Jesse brings his passion for craft, culture and sustainability to projects with a balanced focus on materials, detail and human experience. Outside the studio, Jesse is a member of the AIA Philadelphia Technology & Innovation Committee and has taught architecture at Drexel and Temple Universities where he is a frequent guest critic. 

Key Projects 

Basecamp Delta, Boy Scouts of America, Glen Jean, WV 

Caesar Rodney Dining and Residence Hall, University of Delaware, Newark, DE 

The Clay Studio, Philadelphia, PA 

The Cooper at 200 Market, Buccini Pollin Group, Wilmington, DE 

Jordan Mrazik has more than twelve years of experience practicing architecture. Raised in the Philadelphia region, Jordan received a Bachelor of Architecture from Virginia Tech. He is a passionate advocate for climate change adaptation, regional low carbon design and social impact development. Jordan is a member of Green Building United, the Preservation Alliance for Greater Philadelphia, the Philadelphia Horticultural Society, Friends of McMichael Park, and Friends of the Wissahickon. His many interests outside the studio include horticulture, music, and film. In 2018 he received the AIA Philadelphia Young Architect Award.  

Key Projects 

Maple Hill North Student Housing, University of Arkansas, Fayetteville, AR 

Shelly Pfeifer has over eleven years of experience in architecture, focusing on academic, civic, hospitality, multi-family housing projects. Originally from Southwest Missouri, Shelly earned a Bachelor of Architecture with minors in Global Studies, Art History, and Fine Arts from Drury University. 

She is fascinated by the intersection of landscape and architecture, the honesty of materials, and the expression and evolution of raw finishes. She is also passionate about policy issues involving transit, zoning, and housing. 

Key Projects 

All School Commons, Germantown Friends School, Philadelphia, PA  

Camden Preparatory High School, Uncommon Schools, Camden, NJ 

The Study at Johns Hopkins, Hospitality3, Baltimore, MD  

Town Branch Housing, Blue Crane Development, Bentonville, AR 

Jenn Rezeli uses her experience as a community planner, non-profit executive, and sustainable business owner to amplify DIGSAU’s internal and external impact. Within project teams, Jenn is passionate about stakeholder engagement, grounding design in community needs and wisdom, and advancing sustainability. She received her undergraduate degree from the University of Notre Dame and her graduate degree from Temple University. She has been recognized with leadership awards by the Pennsylvania Environmental Council, Leadership Philadelphia, and the Temple University School of Environmental Design. 

Key Projects 

The Wetlands Institute, Stone Harbor, NJ 

PPR Residence Hall, Swarthmore College, Swarthmore, PA 

The Discovery Center, The Audubon Society and Outward Bound PHL, Philadelphia, PA 

Mark Sanderson is a designer, thought leader, and founding partner of DIGSAU. Mark combines innovative design thinking and extraordinary attention to detail and execution for projects ranging in size, program, and character from single-family homes to cultural, higher education, and workplace projects. His careful stewardship of design culture within the firm has garnered recognition from the American Institute of Architects, Urban Land Institute, the Brick Industry Association, among other organizations. He has served as a lecturer and guest critic at numerous design schools. 

Jamie Unkefer is a designer, community advocate, and founding partner of DIGSAU. As a member of a family of builders with a diverse background in English literature and pottery, Jamie combines a maker’s interest in craft with the inspiration of poetry. His work with arts, civic, higher education, urban developers, and private clients has garnered recognition from the American Institute of Architects, Urban Land Institute, the Brick Industry Association, among other organizations. Jamie serves on the Board of Trustees of the Smith Memorial Playground and Foulkeways at Gwennyd, and is a member of the Arch Street Meeting Preservation Trust Property Committee and the Carpenter’s Company of the City and County of Philadelphia.