A Company Man is a representative of an operating/exploration company. Other terms that may be used are Company Representative, Foreman, Drilling Engineer, Company Consultant, Rigsite Leader or "Well Site Manager".
In a normal scenario, gas/oil-drilling (exploration) companies rent or lease rigs from another company that owns the rig, the drilling contractor. The majority of the personnel on the drilling rig, called 'the rig crew', are employees of the drilling contractor. The Company Man is the on-site representative of the operating/exploration company and is directly in charge of the drilling and associated activities. Other domains such as rig maintenance and crew upkeep are attended to by the Toolpusher, who works for the drilling contractor.
The Company man is knowledgeable in the area of drilling operations and to some extent completion operations. He/she is not generally responsible defining the technical aspects of the well, but instead works with a team of office-based engineers and geologists and is the team member responsible for carrying out the written drilling program in an efficient and safe fasion. Since most of the physical work is carried out by contractors that may have separate interests from the oil company, the company man is often the sole representative for the oil company on location to ensure that plans are carried out according to specifications, timelines, and budgets.
In the modern era, many Company men are degreed Petroleum Engineers or some other discipline of engineering with broad experience in a variety of oilfield jobs. However, many others have some of the skills of an engineer but without a degree, and have worked their way from being a "worm" manual laborer to the position of highest authority on the drilling site, similar to a private working to the position of general through a demonstration of competence. The next step for a company man is to become a specialist "floating foreman," who is skilled at solving complex drilling problems, or to become a "rig superindendent" who may oversee many rigs and have company men as direct reports. From there it is possible for some to move on to upper management in an oil company, or to branch off into a multitude of other careers requiring technical management experience.
Usually, 24-hour supervision is required at the well site. To achieve this, a night company man is utilized.