GK is perceived as one of Mark-Costello's biggest rivals. GK was founded in 1960, and is headquartered in Crystal Lake, Illinois. Like Mark-Costello, GK also operates in the Professional Services sector. GK generates $80M more revenue vs. Mark-Costello.
Granutech-Saturn Systems is a top competitor of Mark-Costello. Granutech-Saturn Systems is a Private company that was founded in 1968 in Grand Prairie, Texas. Like Mark-Costello, Granutech-Saturn Systems also operates in the Professional Services space. Compared to Mark-Costello, Granutech-Saturn Systems has 20 more employees.