With specific focus on the transportation market, OES is dedicated to deliver quality engineering design, planning, and construction management as well as survey and natural resources support to meet our customers’ constantly evolving needs for safe and efficient transportation systems. The same trusted transportation professionals that you worked with at OTIE are now all available at OES. You can reach them at the same office addresses and telephone numbers, while their email extensions have changed to @oesllc.com. OES serves our customers from offices in Green Bay, Madison, and Milwaukee, WI, and Chicago, IL. OES joins sister companies Oneida Total Integrated Enterprises (OTIE), Sustainment and Restoration Services (SRS), and Mission Support Services (MS2), as a tribally-owned company, wholly-owned by the Oneida Nation of Wisconsin.