Who we are

Specialist and experienced

Built for success

Mantle sits within the 3173 Group which includes Spence & Partners (Spence) and Dalriada Trustees Ltd (Dalriada). Its solutions are intrinsic to the success and growth of the business.

Dalriada is one of the largest professional pension scheme trustee companies in the UK. Dalriada uses Mantle technology to deliver more efficient and better services to its members. It works closely with partners committed to the use of Fintech to develop online access for members where possible, and this is their preference. Dalriada provide timely reporting and best in class risk management, all of which contributes to an enhanced member experience and engagement when interacting with their pension scheme.

Spence specialises in advising and managing defined benefit and defined contribution pension schemes (including the provision of the services of a Scheme Actuary) in the United Kingdom and Ireland and acts as a provider of services to employers, trustees, pension plan members and professional advisers. They are a leading provider of pensions data audit and pensions benefit audit services for pension scheme trustees and has significant expertise in remedial pension scheme data work often in the run up to Buy-Out or during a Pension Protection Fund (PPF) Assessment Period.

Mantle is at the heart of Spence’s operation and powers the administration solution as one of four firms on the Specialist Administration and Actuarial Services Panel. Mantle accesses Group resource as required and many of the development insights have come from user practitioners in the actuarial and administration teams. Whilst conceived originally to develop solutions for employers in the Group, we have recently turned our focus to the external market and now number many blue chip clients amongst our customers.

Our Core People

Mike Selby

After graduating from Oxford University in 2002, Mike enjoyed a successful spell with a major benefits consultancy, playing key roles in actuarial, consulting and data management disciplines.

With a strong background in data management, systems and software development, Mike started to develop pensions modelling software, Mantle in 2010, which he now concentrates on full time, joining Mantle Services in May 2014.

DDI: +44 (0) 141 343 9191
E: mike.selby@mantlehosting.co.uk

Brian Spence

Brian is a Fellow of the Institute and Faculty of Actuaries and has been working in pensions since 1987 and qualified as an actuary in 1990.

Brian is a founder of actuaries Spence & Partners Limited, director of independent trustee Dalriada Trustees Limited and director of Mantle Services Limited and Mantle Hosting Limited, all members of the 3173 Limited group of companies.

DDI: +44 (0) 20 3691 2947
E: brian.spence@mantleservices.co.uk

Graeme Riddoch

Graeme is responsible for driving the Mantle software business to realise its full potential. This includes setting the overall direction, identifying new opportunities and product developments.

Graeme joined in November 2019 and has spent the last 10 years in Fintech. Most recently he was the founding director of HUB Pension Solutions a ground breaking DB member option business with a big focus on member engagement.

DDI: +44 (0) 20 3691 2940
E: graeme.riddoch@mantleservices.co.uk

Harry O'Connell

Harry has built up experience in IT and pension sectors, having held roles as a software developer and as an actuarial technician.

Harry is actively involved in software development and provides information security support to a number of companies. Harry has also begun studying towards professional actuarial qualifications.

DDI: +44 (0) 28 9041 2892
E: harry.oconnell@mantlehosting.co.uk

Dennis Mincher

Dennis has built up considerable experience in the pensions industry.

He has a unique perspective, having held roles in data management, actuarial and pension scheme administration. Dennis is actively involved in all aspects of data management.

DDI: +44 (0) 28 9041 2007
E: dennis.mincher@mantleservices.co.uk

Roisin McKeever

Roisin entered the financial services industry in 2002 and is responsible for the implementation and management of information security management systems for several companies.

She has particular expertise in physical and environmental security, asset management and business continuity. Roisin also has a number of years experience in IT support.

DDI: +44 (0) 28 9041 2023
E: roisin.mckeever@mantleservices.co.uk

Susan McFarlane

Susan leads the marketing function for Mantle and is supported by the marketing team, handling all promotional activity including business development, marketing, events and PR.

Susan has spent over 15 years working in marketing across a range of industries and sectors both in the UK and overseas.

DDI: +44 (0) 20 3691 2946
E: susan.mcfarlane@mantleservices.co.uk

Jason Swann

Jason entered the pension industry in 2006, working as a pension scheme administrator. He has particular expertise in benefit calculation and scheme take-on work. Jason is studying toward his professional qualifications with the Pensions Management Institute.

Jason is actively involved in all aspects of data management and provides administration consulting services to a number of pension schemes.

DDI: +44 (0) 28 9041 6497
E: jason.swann@mantleservices.co.uk

Kev Seenan

Kevin is a Software Developer at Mantle working on providing new products to customers. He has a real drive for this and attended an intensive 16-week Software Development course to gain the skills required to begin a new career as a Software Developer.

DDI: +44 (0) 20 3691 2946

E: kev.seenan@mantleservices.co.uk

Patrick Lohan

Patrick is a Software Developer at Mantle

DDI: +44 (0) 141 370 0021
E: patrick.lohan@mantleservices.co.uk

You can rely on us

Mantle is an enterprise scale solution.​ Hosted across AWS and Google Cloud.

99% service availability

Multiple redundancy

Rapidly scalable

Lets talk about you​

To discuss how we can help with your company pensions and challenges, please get in touch with Graeme Riddoch.

For general enquires graeme.riddoch@mantleservices.co.uk.


Linen Loft
27-37 Adelaide Street
Belfast , BT2 8FE UK
+44 28 9041 2888