Sovereign Housing
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Meet the Executive Board

While the Board is responsible for the effective governance of the business, day to day management is delegated to the Executive Board members.

The Executive Board, led by Chief Executive Mark Washer, work to deliver the strategy, oversee and improve performance while protecting and growing the business.

Mark Washer

Mark Washer 
Chief Executive


Mark joined Sovereign as Chief Executive Officer in June 2018, from his role as Chief Financial Officer at Clarion Housing Group. Mark has worked in the housing sector for 25 years and was, until recently, the Vice Chair of the National Housing Federation. 
Keith Astill

Keith Astill
Executive Director
Corporate Services


Keith is a commercially-orientated senior HR leader, with experience across sectors and economic cycles and at Board level, with a proven record in general management. His experience includes executive responsibility in UK financial services, telecomms and retail, with a particular focus on leadership of major change and integration Keith joined Sovereign in December 2017.      

Heather Bowman

Heather Bowman
Chief Operating Officer


Heather joined Sovereign in 2001 and has led a range of service areas as Managing Director for former subsidiary Sovereign South+West as well as Executive Director for Housing and Communities. Heather is a Chair of the National Housing Federation’s South East Standing Board and elected member of the CBI South East Regional Council.

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Kevin Ives
Chief Information Officer

Kevin joined Sovereign in August 2019. With significant experience in delivering transformational change through technology, he’s held several senior roles in IT, working across the water, construction and transport sectors. Most recently Kevin led on digital delivery for Arriva Trains group of businesses, transforming its customer, operations and engineering solutions to businesses including CrossCountry and Northern and London Overground.

Barry Nethercott

Barry Nethercott
Interim Chief Financial Officer


An experienced leader, Barry joined Sovereign in January 2019 as Interim Chief Financial Officer. For the past 10 years, Barry has worked at an executive level at several housing associations including The Guinness Partnership, Southern Housing and, most recently, with Network Homes.

Nicole Sharp

Nicole Sharp
Executive Director Property


Nicole is an experienced director responsible for leading the strategic development and delivery of housing and landlord services including a business-wide customer contact centre. Nicole is passionate about developing a forward-thinking customer-centric culture, part of the Transformation Board she has played a key role in Sovereign’s digital transformation – bringing systems, people and policies together and going digital.
Tom Titherington

Tom Titherington 
Executive Director
Development and Commercial

Tom joined Sovereign in January 2019, bringing a wealth of housing experience in delivering new homes on large-scale developments, building private and public sector partnerships and creating sustainable places. Tom was formerly Executive Director of Property and Growth at Catalyst Housing and before that spent two years as Chief Executive of the Network Housing Group, building on thirteen years as Executive Director of Business Development at The Hyde Group.