KPMG also received Life Achievement award for leading the list for the third time in four years at the presentation ceremony last week.
John Griffith-Jones, chairman of KPMG in the UK, said: "We are delighted and extremely proud to be named Best Big Company to Work For for the third time. These awards reflect the views of employees themselves - that is why they are so valued.
"These are difficult times for the UK economy, and for companies and employees everywhere. The state of the economy may be beyond our immediate control but the way we work together is ours to choose. A sense of shared values and collective purpose will be more important than ever if companies are to weather the storm."
Other winners include Accenture in the training and development category and Morgan Stanley in the leadership category. Vodafone scooped a special prize for being the Best Big Company to give something back.
Runners up in the Best Big Companies category included Bourne Leisure, American Express Services Europe, Marriott Hotels International and Mott MacDonald.
This year, 997 organisations entered The Sunday Times Best Companies to Work For lists, marking the largest ever number of entries at a 14.4% increase from the number of organisations entering last year.
Jonathan Austin, founder and CEO of Best Companies, said: "This award highlights the achievements of organisations with good leadership and high levels of employee engagement - factors that are even more important in these uncertain times. Companies that secured their place on The Sunday Times Best Companies to Work For lists are among the very best employers in the country and we congratulate them on their achievement."
The full list of Best Companies to Work For will be published in Sunday's issue of The Sunday Times.
