Richard Douglas joined the London agency in the part-time role earlier this month, having retired from the Department of Health.
Douglas was the DH's director general for finance and the NHS between 2007 and May 2015. In a total of nearly 40 years in various roles in Whitehall, he spent three spells at the DH, as well as working for HM Customs and Excise and the National Audit Office. He was also head of the Government Finance Profession, part of the Civil Service.
Bill Morgan, one of Incisive Health’s founding partners and a former special adviser to then health secretary Andrew Lansley, said: "There is no-one with a better idea of how the NHS will face up to its financial challenge than Richard, and there is no one who better understands the interplay between politics, policy and the NHS than him. He is the best person to help our team chart the future of the NHS and advise our clients on how they can play their part in it."
Douglas said: "It is the premium Incisive Health places on really understanding how the NHS works that sets it apart and makes it the perfect fit for me."
Incisive Health was formed in September 2013, and has grown quickly, ranking 85th in the 2015 PRWeek UK Top 150 consultancies, with fee income of £2.4m. It now has 20 staff.
Incisive said that Douglas' appointment was approved by the Advisory Committee on Business Appointments, and that his work would adhere to the committee's conditions of Douglas not becoming personally involved in lobbying the UK Government on behalf of Incisive Health or its clients, nor drawing on privileged information available to him from his time in Crown service.