You’ll have to be quick – nominations must be made through The Guardian website by 23:59 BST on Wednesday 28 May.
The judges will be looking for commitment, enthusiasm and the differences the individual has made to the charity.
A shortlist of five nominees, along with details of their organisation, will be published on Monday 2 June and will be featured in a gallery on the Guardian Voluntary Sector Network. Readers will vote for their winner. And the winner, who will win an iPad, will be announced on Friday 6 June.