Meet the Executive Team



Donna Johnson - Chief Executive

Donna has spent the last 25 years working in or on behalf of the social sector. Her overriding passion is for truly affordable housing and home ownership, and the crucial role it plays in enabling people who do not have access to the general market to become healthier and wealthier. Experienced in developing, regenerating and managing a diverse range of housing and tenures in both rural and urban environments, she remains convinced that the most successful neighbourhoods are those that grow through consensus and a pride in place. This is what drives her commitment to collaboration and listening to deliver better. Her strong value base, belief in the provision of sustainable low cost homes and support for the role that smaller housing associations can play in the broadening of choice, contributed to the successful set up of the new strategic partnership between South Western Housing society and Tamar Housing to form WTHP. As CEO, Donna will seek to drive forward the partnerships agenda of building business resilience, achieving greater capacity for growth, achieving value for money efficiencies and delivering better services to tenants and residents.


Catherine Davies-Gallagher - Finance Director

Finance Director for Willow Tree Housing Partnership.  Catherine is a qualified accountant (CIMA) and has an MBA from the University of Strathclyde.  She has worked in defence, telecoms, investment banking, IT outsourcing, and the not-for-profit sectors, managing activities which range from large scale transaction processing through to FP & A, financial control and commercial functions.


Martin Carney - Interim Head of Operations

Martin joined the Army at 16 and left after 24 years' service. He has worked in the Social Housing Sector for the last 24 years having worked for Sedgemoor District Council, Signpost Housing and South Western Housing Society prior to the new strategic partnership between South Western Housing and Tamar Housing. Martin is responsible for the housing management service to tenants and is a corporate member of the Chartered Institute of Housing.


Callum Turner - Head of Development & Asset Management

Callum has been working in housing association new build development since graduating from Nottingham Trent University in 2009. He is a member of the Chartered Institute of Building and is working towards his Royal Institute of Chartered Surveyors membership. Callum is also Willow Tree Housing Partnership’s Champion for helping us tackle domestic abuse.


Sue Sparks - Head of Corporate Services

As Head of Corporate Services, Sue delivers critical support and coordination for Willow Tree Housing Partnership. Sue is committed to high standards and quality and is responsible for ensuring the integrity and efficiency of information, administration and governance systems and procedures.