About Us

SGT JV was formed by Sustainable Group, Inc. and Terraphase Engineering Inc. on April 11, 2012 to serve public and private sector clients with environmental engineering and construction services. Both companies and the joint venture are small businesses under NAICS Code 541330. The SGT JV is led by Roger Wykle, P.E., President of the Sustainable Group, is a 20-year veteran of the USCG who rose from E-1 to the rank of Commander (O-5).

Sustainable Group specializes in civil site construction, demolition, and environmental remediation. Sustainable Group also provides innovative sustainable site solutions for Leadership in Energy and Environmental Design (LEED) projects, as well as expert facilities environmental plans and compliance services, sustainability and energy consulting and environmental engineering.

Terraphase is a California-certified small business founded by four Principals in September 2010 to provide services in areas of environmental and geotechnical engineering, site assessment, soil and groundwater remediation, regulatory negotiations, wetland permitting, stormwater management, facility auditing and litigation support.