 | TULLOCH | huntsville, ontario, canada | 279 | civil engineering | 1991 | |
 | Thomas & Hutton | Savannah, georgia, united states | 350 | civil engineering | 1946 | |
 | CTL Engineering, Inc. | Columbus, ohio, united states | 240 | civil engineering | 1927 | |
 | DiPrete Engineering | cranston, rhode island, united states | 77 | civil engineering | 1988 | |
 | Engineering Alliance, Inc. | mesa, arizona, united states | 12 | civil engineering | 1987 | |
 | Southeast Engineers, LLC. | Baton Rouge, louisiana, united states | 15 | civil engineering | 2014 | |
 | Molzen Corbin | Albuquerque, new mexico, united states | 54 | civil engineering | 1960 | |
 | 3J Consulting | beaverton, oregon, united states | 53 | civil engineering | 2009 | |
 | Trotter and Associates, Inc. | st. charles, illinois, united states | 51 | civil engineering | 1999 | |
 | Barton Engineers | London, england, united kingdom | 1 | civil engineering | 1993 | |
 | Kalos Engineering Inc. | hamilton, ontario, canada | 18 | civil engineering | 2012 | |
 | D.M. Wills Associates | peterborough, ontario, canada | 79 | civil engineering | 1988 | |
 | Talbert, Bright & Ellington, Inc. | charlotte, north carolina, united states | 24 | civil engineering | 1994 | |
 | moloney & sons engineering | parkhurst, queensland, australia | 10 | civil engineering | 2014 | |
 | MatkinHoover Engineering & Surveying | Boerne, texas, united states | 44 | civil engineering | 2002 | |
 | CivilCorp, LLC | Victoria, texas, united states | 77 | civil engineering | 2008 | |
 | Cowell Engineering, LLC - Structural Engineers | Saint Louis, missouri, united states | 3 | civil engineering | 1996 | |
 | Consult Engineering, Inc. | Punta Gorda, florida, united states | 10 | civil engineering | 2010 | |
 | Sandlot Engineering, LLC | Houston, texas, united states | 6 | civil engineering | 2019 | |
 | Harbourside Engineering Group | dartmouth, nova scotia, canada | 68 | civil engineering | 2008 | |
