Promoted to Distinguished Professor of Landscape Architecture, 2017.
Academic Editor, Sustainability journal, since 2015.
Engaged Scholarship Exemplar, Campus Compact (coalition of 1,100 U.S. colleges and universities committed to the public purposes of higher education), for Tamminga and DeCiantis (2012) paper on the Engaged Studio, 2015.
Invited Reviewer, Robert Rauschenberg Foundation's Climate Change Solutions Fund inaugural program, 2015.
Astorino Fellowship, L.D. Astorino Companies Endowment, School of Architecture and Landscape Architecture, for convivial greenstreets sabbatical research, 2014.
City Lights featured speaker at Phipps Conservatory, Pittsburgh, hosted by the Penn State Alumni Association and College of Arts & Architecture, 2013.
Certificate of Editorial Achievement, for guest editorship of Sustainability journal special issue Urban Regeneration and Sustainability, from MDPI AG Switzerland, 2013.
National Finalist (1 of 4), Peter C. Magrath University / Community Engagement Award, for The Pittsburgh Studio: Regenerative Design in Stressed Communities, from the Association of Public and Land-grant Universities, 2011.
W.K. Kellogg Foundation Engagement Award, for The Pittsburgh Studio, from the Association of Public and Land-grant Universities, 2011.
Community Engagement and Scholarship Award, for The Pittsburgh Studio, from Penn State University, 2011.
Returning Fellow, Fine Outreach for Science, Global Connections project, Carnegie Mellon University, 2010.
Fellow, Fine Outreach for Science, Global Connections project, Carnegie Mellon University, 2009.
Brazilian Institute of Architects Award for Outstanding Achievement in Urbanism–Theoretical Works, for Águas Urbanas (Tângari, Schlee, Andrade, and Dias, eds. 2007; Tamminga: chapter author, chapter co-author), 2008.
Audubon Cooperative Sanctuary Certification, for the Elk's Country Club riparian ecological restoration project, from Audubon International, with ClearWater Conservancy, 2008.
National Wildlife Habitat Certification, Corporate Lands category, for the Lime Lakes Phytoremediation Project, from the Wildlife Habitat Council, with PPG Industries, Inc. and Key Environmental, Inc., 2006.
Governor’s Award for Watershed Stewardship, for the Maiden Creek Watershed Keystone Plan, from the Commonwealth of Pennsylvania, as Heinz Faculty Fellow with the Center for Watershed Stewardship, 2001.
Governor’s Award for Watershed Stewardship, for the Nine Mile Run Project, from the Commonwealth of Pennsylvania, with Carnegie Mellon University's Studio for Creative Inquiry, 2001.
Invited Scholar, Marsh-Billings-Rockerfeller National Historic Park, forest management charrette, Center for Studies in Landscape History, Woodstock Vermont, 2000.
Toronto Architecture & Urban Design Award, for the Don Valley Brickworks, Large Places category, from the City of Toronto, with Hough Stansbury Woodland Ltd. (also Landplan Collaborative), 2000.
Nine Mile Run project featured in Miles, M. 2000. The Uses of Decoration: Essays in the Architectural Everyday,
chapter 6. London: Wiley & Sons.
Heinz Faculty Fellow appointment to the Center for Watershed Stewardship, Penn State University, 1999-2001.
National Award of Recognition for Research and Teaching, from the Council of Educators in Landscape Architecture, 1998.
Three Rivers Environmental Award, for the Nine Mile Run Project, from the Pennsylvania Environmental Council, as Research Fellow, Carnegie Mellon University Studio for Creative Inquiry, 1998.
W.E. Buker Award, museum residency for research proposal “Re-presenting the Remnant ‘Great Plains’ – An Inquiry into the Herbs of Pennsylvania’s Tall Grass Prairies,” from the Carnegie Museum of Natural History, 1998.
Urban Design Award of Excellence, for the Hewlett Packard Canadian Headquarters, from the City of Mississauga,
with STHIP and HSW, 1993.
Second Place Finalist, for Humberwood Elementary School green design competition, from the Etobicoke Board of Education, Toronto Separate School Board, with R. Robbie and M. Hough, 1993.
National Award for Planning Excellence, for the Don River Restoration Plan, from the Canadian Institute of Planners, co-winner with M. Hough, 1992.
National Citation Award, for the Toronto Brickworks Master Plan, from the Canadian Society of Landscape Architects, with M. Hough and G. Baird, 1991.
Regional Merit Award, for the Toronto Brickworks Master Plan, from the Canadian Society of Landscape Architects, with M. Hough and G. Baird, 1991.
Urban Design Award - Built Projects, for Hurontario/Rahtburn Streetscape Improvements, from the City of Mississauga,
with Totten Sims Hubicki Associates, 1989.
CMHC Graduate Fellowship, Canadian Government, for studies at Queen's University, 1985.
Queen's University Graduate Scholarship, for studies at Queen's University, 1984.
Award of Honor, from the American Society of Landscape Architects, for excellence in studies at the University of Guelph, 1983.
Award of Merit, from the Canadian Society of Landscape Architects, for excellence in studies at the University of Guelph, 1983.