Barbara Heller founded Heller & Associates in 1982. She has contributed to over 500 Project Manuals for a wide range of building types which include commercial, residential, military, institutional, restoration and retail projects. Significant projects include: CISA Headquarters, Renovation of the National Air & Space Museum, Renovation of National Geographic Public Space, FDR Memorial and over 20 U.S Embassies.

Ms. Heller is a former Chair of the AIA Documents Committee and former Chair of the Specification and Building Technology PIA. She was elevated to Fellow in the American Institute of Architects and is a Senior Fellow of the Design Futures Council. Ms. Heller is also CEO of sister firm Design + Construction Strategies, a consulting firm that assists building owners with strategic planning, project support and internal work process improvement.

Anne joined Heller & Metzger in 2009 has been involved in the preparation of over 50 Project Manuals for projects ranging from historic preservation/renovation to high-rise residential, universities and schools, landscape architecture, mixed-use retail and secure government facilities. Notable projects that she has spearheaded for H&M include: The University of Virginia Ivy Mountain Musculoskeletal Center, Powell Elementary School, Banneker High School, Martin Luther King Jr. Library Landscape and The Wharf DC. Anne has been elemental in developing H&M's landscape architecture specifications services since 2010.

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Her previous architectural experience focused on construction administration in addition to serving as Project Architect for several projects in the DC metro area. for large-scale corporate and multi-family mixed-use projects. Anne is a graduate of Clemson University (Master of Architecture) and University of Maryland (B.S. in Architecture).  An AIA member, Ms. Stenger is a LEED Accredited Professional and is licensed to practice architecture in Virginia.

Maria joined Heller and Metzger in 2014, bringing with her more than 25 years of architectural experience focused on design and management of a wide range of projects with an emphasis on academic, and science and technology facilities. As a Designer, Senior Project Manager, and Project Executive, Ms. Antonis’ leadership and work with talented design teams provided her with the knowledge, experience and understanding of the processes involved in the design of both small- and large-scale complex projects.  

In her position at Heller and Metzger, Ms. Antonis has been involved in the preparation of a variety of project manuals including, government, educational, institutional, and mixed-use projects. Her strong foundation in design and technical design brings value to her contributions and insights as a specifier, ensuring the many aspects and specialists on a project are successfully coordinated, and the technical criteria is efficiently managed; leading to successful outcomes for clients and project teams. Maria is a graduate of Virginia Tech (Master of Architecture) and Pennsylvania State University (B.S. in Architecture). She is a LEED accredited professional and is licensed to practice architecture in the District of Columbia and in Virginia.

Sara Stewart joined Heller & Metzger in 2004 in the role of technical writer. Ms. Stewart assists the senior specification writers at Heller & Metzger in the reviewing, editing, and compiling of specifications for all project types. She interacts with architects and manufacturers as needed to obtain product literature and clarify requirements. Significant H&M project experience included the Pentagon Renovation for Wedges 2, 3, 4, 5, National Air and Space Museum Revitalization, and the American Institute of Taiwan, among many others.

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Ms. Stewart previously worked at the American Institute of Architects as an editor/writer, where she covered topics ranging from practice management to the latest in hospital design. Ms. Stewart holds an M.A. in art history with a specialization in 20th century American architecture from Penn State University, and she holds a B.A. in journalism from the University of Maryland.