In order to identify the impact of coaching on sustainable development of an organisation, coaching support and development programme is developed and tested. The programme is designed using the organisational life cycle model. The specific focus is on the measurement system to evaluate the programme ongoing results and outcomes. Coaching programme took place from June 2018 to December 2018 in the organisation which operates in wholesale business. The programme aims to reinforce performance and to foster the creation of more innovative sustainable organisational culture. All sales staff of one of the units (n=19) received seven coaching sessions with a professional external coach. The participants were divided into three groups: team leaders group; salesmen lively group and salesmen Skype group. The current paper discusses the value and impact of the programme on the individual behaviour, team and organisational performance. Data was collected through group and individual interviews, by pre, during and post feedback questionnaires, and the comparison of the results of the coached unit with the control unit. Findings indicate that the positive impact of the programme is reflected first of all in the increase of awareness and improvement of communication. The team leaders indicated the highest rate of change as a result of the programme in contrast to the Skype group. The results showed that the coached unit performance was higher as compared with the control unit. The paper concludes that a coherent and consistent coaching programme with a holistic evaluation system leads to improvement in organisational sustainability.