Tom Flood, chief executive of the environmental volunteering charity BTCV, will step down from the role this the summer after 25 years at the charity.
Flood, who has been the charity’s chief executive since 2001 and was previously its marketing director, will leave the post in July. He will take up a voluntary role as its vice-president from that date.
Flood told Third Sector he would not take another full-time job but would be looking for a number of voluntary roles.
"I will be 65 in May and it seems like a good time to be doing something different," he said.
He said he would continue to chair Acevo Solutions, the support service for members of the chief executives body, and "will be looking for other voluntary opportunities".
He said he would like to be involved with "a charity working with an unpopular cause that struggles to get media attention", and had an interest in young people's issues.
Flood said the recruitment process for a successor would begin in the next few weeks and the role would be advertised internally and externally. He said he would be closely involved in the process.