The water company was 21st on the list out of 400 businesses surveyed independently by Statista for Bloomberg, to discover the UK’s best employers.
It was also ranked as the number one employer in the UK utilities sector.
Louise Hunter, director of corporate affairs, said: “We’re delighted to be named in the Best UK Employers list.
“This external recognition confirms what our employees already tell us - that we’re a great place to work, and in our own employee survey, 81% of people told us they are proud to work for the company.
“Perhaps some of the reasons why they think that are because of the support we give our people through our wellbeing programmes, the experiences and opportunities we provide for personal development, and the time we give to people to volunteer in their local communities.”
Since 2002, Northumbrian Water has given more than 100,000 hours back to local communities with its employee volunteering scheme, Just an hour.
The company also supports 9,000 young people a year with its employability programme.