Diesel mechanics in the oil and gas industry work indoors in shops, as well as outside in the field and even along the roadside, if necessary. Flexibility is important and they should be prepared to work outside in all types of weather conditions. Some work a standard 40-hour week, but many put in 70 or more hours per week, especially if they are self-employed and are retained by a company on a contract basis.
Diesel mechanics must be able to work with newly-developed technologies, and since diesel engines are comprised largely of electronic components, repairing and maintaining them is complex. For this reason, a diesel mechanic with formal training and certification may have an advantage over another employee without those credentials.