The organisation's picked up 2nd prize at the Sunday Times Best 100 Not-For-Profit Organisations to Work For 2015.
At the same awards bosses John Kirkby and Matt Barlow were also jointly awarded with the title of Best Leader - for the fifth time.
Speaking about the achievement, CAP's Founder and International Director Mr Kirby said: "We're humbled and delighted.
"This is the sixth time we've entered these prestigious awards. We never take it for granted because there are some very strong contenders.
"However, we recognise that our most valuable resource is our staff and we deliberately aim to be generous employers, something that reflects our faith and the way God calls us to live."
The awards are judged using anonymous staff questionnaires which ask questions about job satisfaction and treatment.
It's reported last year 900 companies took part.
Christians Against Poverty provides free debt counselling, job clubs, money management courses and sessions to help break life-controlling dependencies.