Mike Parkinson, policy adviser at Oxfam, has been nominated to succeed Nick Kavanagh as chairman of the Charities' Tax Reform Group.
Parkinson is expected to be endorsed by the group's membership at its AGM on 10 May.
He has also been involved with CTRG for many years and is working with Helen Donoghue, director of the CTRG, and Kate Sayer, of accountants Sayer Vincent, on pilot studies to determine how an irrevocable VAT refund scheme would work for different charities.
Parkinson said: "Getting the tax system right - both in relation to the incentives on giving and on expenditure - is critical, and CTRG's role in the process is pivotal.We need to ensure that the sector is treated fairly and equitably by the tax system. This is clearly not happening at present. Our challenge is to ensure that the Government knows where the obstacles are and what solutions would work. I look forward to leading the next phase in the group's campaigning."