Dietsmann is the leading independent specialist in Operation & Maintenance services for continuous-production plant in the oi ... l & gas and power industries with over 40 years of accumulated know-how of plant and equipment. This is evidenced by Dietsmann’s long-term partnerships with many IOCs and NOCs. As the largest independent provider of specialized operation and maintenance services, Dietsmann is also the leader in Maintenance Engineering and Inspection. read more