Rupert Jones-Warner was stuck at Base Camp of the world’s highest mountain when the 9.7 magnitude quake struck on Saturday morning.
He has now left the mountain to join the rescue effort in Kathmandu.
More than 4,000 have now died in the devastating natural disaster.
A spokesman for Chestnut Tree House hospice said: “Everyone at Chestnut Tree House is very thankful and relieved that Rupert is safe and very proud of his decision to try and join the rescue mission.
“We are all hoping that he and his colleagues stay safe in what is a very difficult and dangerous situation.”
Charity volunteers from Worthing and Southwick are currently being evacuated from the mountains, after being forced to abandon their 11-day trek.
The group of five were raising money for Worthing charity Babybuddy and could feel the tremors from their base an hour and a half away from Kathmandu.
West Sussex firefighters have flown out to the Nepalese capital to aid with the rescue mission.
Worthing Rotary have set up a donation page to help those affected by the earthquake.
Visit www.worthing-rotary.org/fund-raising.htm for more information.