The offshore industry is currently experiencing the fourth industrial revolution that brings new challenges to the supply chain and requires the implementation of classical paradigms such as Lean philosophy in order to increase efficiency and improve processes, obtaining sustainable competitive advantages that are basic requirements for digital transformation. However, the application of Lean in the trucking industry is still limited and there is a dearth of practical studies on how Lean Transportation (LT) can support the improvement of offshore operations. Thus, the objective is to apply LT techniques to reduce waste in the dedicated transportation process for the offshore supply chain of a large oil and gas company. To do so, it was used action research with a multi-method approach through scoping review, focus groups and participant observation and application of Lean tools such as Value Stream Mapping (VSM) to identify waste present in the process and possibilities of competitive improvement for the internal logistics area of the company under analysis, allowing a planned transport logistics with a level of service appropriate to customer needs. As a result, there was a reduction in waste mainly in the waiting stages of loading and unloading in dedicated road transport through a real intervention case, resulting in the implementation of control actions, automation and improvement of activities with a significant reduction in downtime of the process, monetary gain of BRL 6,300,000.00 per year for the operation and products such as a benchmarking questionnaire, action research protocol and PDCA cycle that can be applied to other companies in the same segment. We also identified, qualitatively, waste associated with human effort and digital resources misused or not implemented.