A drilling fluid Engineer commonly referred as Mud Engineer is a key supervisory personnel in drilling rig. The Mud Engineer is in-charge of preparing and maintaining drilling fluids which is essential in drilling a stable bore hole and ultimately a good producing well. It involves acquiring knowledge on downhole problems, planning suitable mud system, solid control equipment to separate drilled solids and testing of drilling mud to have concurrence with the specified drilling fluid program. The fresh university graduates undergo a class room and practical field visits to have good understanding. A well-equipped laboratory prepares them for practical mud testing.