JoAnn Trach Tongson, PLA, LEED AP BD+C,

JoAnn Trach Tongson, PLA, LEED AP BD+C

Associate Principal


JoAnn Trach Tongson brings over 25 years of experience in landscape architecture, planning, community facilitation, and site design collaborating with project team members to design and sustain places for diverse ecologic systems.    JoAnn has served on the Board of Directors for USGBC Maryland; and is an active member of the American Society of Landscape Architects  and the Women’s Transportation Seminar.  She has reviewed Greenbuild presentations in 2013 and 2014.  She also supports local community groups as Open Space Chair for the Mayfield Improvement Association, Board member for the Harford Road Community Review Panel, and as a board member for the Friends of Clifton Park. JoAnn brings her passion for exterior spaces and empowering communities through greening initiatives and grant writing and teaching gardening at University of Md Baltimore County in 2011, 2012, and 2014.

JoAnn leads the landscape architectural design for a variety of projects including higher education, residential, parks & recreational, streetscape and transportation at Mahan Rykiel Associates. She has worked on notable green projects including Green Tracks for the Maryland Transit Administration.  JoAnn has previously presented at SCUP Mid-Atlantic in 2010 and Sustainable Exterior Design: Integrating LEED & Regulatory Mandates at the Chesapeake Green Expo in 2009.JoAnn brings her recent Traveler’s Fund Award experiences of visits to Portland, Oregon and Philadelphia, Pennsylvania Green Infrastructures practices to enrich local projects.  She has used her experiences to call for an expanded view of the role of plants and trees in local practices.

Focus Area

Parks & Recreational, Schools, Streetscape, Transportation, Institutional Projects
Peng Gu, Associate Principal
Executive Vice President
Cathy Snellinger, Vice President/Chief Financial Officer
Vice President/CFO
Tom McGilloway, Principal
Planning Director
Mark Pelusi, Associate Principal
Operations Director
Matt Renauld, PLA Associate Principal
Design Director
Ken Schmidt, PLA, ASLA
Isaac Hametz, Research Director
Research Director
Maurice Blow, CADD Technician
Terry Burns, Senior Associate
Senior Associate
Jason Castillo, PLA, Associate Principal
Associate Principal
Jeff Dube, Landscape Designer
Landscape Designer
Environmental Specialist
Michael Humes, PLA Associate Principal
Rudraksha Jhaveri, Associate
Senior Technical Lead
Associate Principal
Steve Kelly, Associate Principal
Associate Principal
Elaine Ku, Landscape Designer
Landscape Designer
Amina Mohamed, Landscape Designer
Landscape Designer
James Sink, Landscape Architect
Landscape Designer
JoAnn Trach Tongson, PLA, LEED AP BD+C,
Associate Principal
Shihua Wang, Landscape Designer
Landscape Designer
Office Manager
Bryan Dunn, Communications Director
Communications Director
Cynthia Fraser
Marketing Director
Lucy Hill, Contract Administrator
Contract Administrator