Stromberg / Garrigan & Associates is a full-service landscape architecture and urban design practice founded in 2007 by its two principals, Timothy J. Stromberg, MLA and Sean C. Garrigan, MLA, both graduates of the University of Pennsylvania. The firm has fourteen employees located in three offices in Metro Philadelphia, Pittsburgh and Norfolk, Va. It is a collective studio of landscape architects, architects, engineers, planners and urban designers that focus on ways to improve the human and ecological environment through innovative and collaborative design. SGA specializes in the practice of "land recycling," often reusing contaminated sites referred to as brownfields.