Activa Contracts' managing director Ian Hill and sales and marketing director Lisa Temperton will walk on the wing of a plane for Hope for Tomorrow charity.
As part of an 11-strong team, the pair will walk on the wings of a biplane as it takes off on May 21.
The group hopes to raise £24,000 for Hope Tomorrow, which is dedicated to bringing cancer treatment closer to patients’ homes by providing a Mobile Cancer Care Unit (MCCU to every oncology centre within the UK.
Hill said: “Hope for Tomorrow is a fantastic charity that provides positive help to people who are affected by the treatment of cancer. Lisa wanted to take part in the wing walk and she convinced me to also be involved.
“Wing walking is typically for people who are thrill seekers, but that is not me. I can barely stand on a chair without feeling giddy!”
The wing walk will take place in the skies above Gloucestershire, close to the charity’s Tetbury headquarters.
The ‘Wings of Hope’ team taking part in the wing walk is being led by charity founder and trustee Christine Mills and, with the charity’s close connections with the motor industry, also includes Derek Bell, five times winner of the Le Mans 24-hour race and a charity patron.
Mills said: “It is a daunting challenge for us all, but nothing compared to what cancer patients have to face.
"It costs Hope for Tomorrow £40 per patient to have their treatment closer to home on one of our units and our challenge is to help 600 patients with our target of £24,000.”