Julia's House hospice has topped The Sunday Times 100 Best Places to Work in the Public and Charity Sectors, published yesterday.
Charities made up 76 of the 100 organisations listed.
Martin Edwards, chief executive of Julia's House, said he was unsurprised that the majority of organisations in the top 100 were charities.
"I think we've suspected for a while now that charities are better managers of people than the public sector," he said. "This is more evidence for it."
The Third Sector columnist said his organisation had won because it never stopped thinking about the impact of decisions on its employees.
"I think that you can never stop focusing on your staff," he said. "I always believe there is a link between how well you engage with your staff and how much they help your beneficiaries."
This year is the first in which the public and charity sectors have had their own index. Last year, social inclusion charity P3 topped the list of best medium-sized companies.