About Us

An elevated position

3173 is a UK firm of pensions experts with clients throughout the UK, serviced from offices in London, Belfast, Glasgow, Manchester, Birmingham, Bristol and Leeds.

Working at 3173

The 3173 group of companies includes:

  • Dalriada Trustees Limited: one of the UK’s largest professional pension scheme trustee companies.
  • Mantle: reimagines the traditional models of defined benefit pensions administration and actuarial valuation software.
  • Spence & Partners: pensions consultants, actuaries and administrators who provide simply smarter solutions for trustees, employers and members.

The 3173 proposition



Actuarial Services


Specialist IT solutions

Exceptional Results






pension scheme


We value personal effort, clarity of thought and creativity. We respect and support each other and use our collective brain power to make great things happen.


We encourage flexibility in relation to time and working space to best suit the individual and their family, the team and the challenge.


Responsibility is enhanced by Freedom and Flexibility.


Interdependence means we are all in it together; we work in teams and our teams need to work with each other.
We respect everybody we work with and treat them as individuals.

Corporate Responsibility

At 3173, we believe that we can positively influence, improve and support the communities in which we live and work. The strength of our business is in the foundations built by our employees based in each of our local offices. Our Culture Policy – ‘Above all else’ – portrays the way in which our business has grown in its 20 year history and we encourage all our staff to follow our ethos and goals.

View Corporate Responsibility