Outdoor adventure (OA) programmes have developed an enduring reputation for developing desirable psychological states and enhancing wellbeing. However, research examining the impact of these experiences in occupational contexts is limited. Through an in-depth case study research design, this study explored the experiences of nine employees while participating in a five-day OA-based programme. Data were collected through psychological capital (PsyCap) questionnaires administered before and 1-week after the programme, visual analogue scales and audio recordings completed during the programme along with participant observations by a researcher, and qualitative interviews conducted 8 weeks after the programme. Participants reported a mean increase in PsyCap scores, indicating the programme's positive impact on individuals' self-efficacy, resilience, optimism, and hope in work specific contexts. Additionally, the themes identified through the qualitative data suggested that employees and the team experienced a deep sense of accomplishment, shared success, and developed desirable attitudes towards teamwork. Employees also reported an enhanced sense of psychological wellbeing through connecting with natural environments and stepping away from the demands of the workplace. Findings shed light on the value of outdoor experiential forms of learning as an alternative to more traditional occupational training programmes in promoting desirable psychosocial outcomes in workforces.