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Our senior team

Our senior leadership team guides and directs Trivallis.

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Meet the team

Our executive team make the big decisions, set goals, and plan strategies to put tenants first and help the company succeed. They also support and motivate employees to live by our values, ensuring everyone works together towards common objectives.

Duncan Forbes

Chief Executive

Duncan is an experienced leader and lawyer with 35 years of experience in public, private, and voluntary sectors, as well as community-owned social enterprises. He has a strong background in working with various communities and organisations, focusing on areas like housing, public services, poverty and inequality, and regeneration.

His specific interests and expertise are in change management, leadership, governance, regulation, and coordinating public services to better serve the community. He is passionate about improving long-term quality of life through better preventative services.

Louise Attwood

Executive Director of Development, Assets and Sustainability

Louise is responsible for delivering our growth and regeneration programmes, leading on the establishment of outright sales and private rented activities as well as delivering high quality affordable homes across South East Wales. She brings extensive experience in housing development and regeneration. She has previously worked within the social housing sector and as an independent property consultant, successfully managing large-scale projects that have not only increased housing stock but also improved community infrastructure and cohesion.

Keiron Montague

Executive Director Communities

Born and bred in Maerdy, Keiron is a social housing professional with a keen interest in tackling poverty and community regeneration. He started his career as a Community Involvement Officer and then moved into youth work. He worked for a number of housing associations in South Wales before joining Trivallis in 2019 as Head of Development and Regeneration. He has also served as a Councillor for RCT and an Independent Community Board Member on Cwm Taf University Health Board.

Lisa Pinney

Executive Director Resources

Lisa joined Trivallis in May 2023 and has over 15 years’ experience of working in Welsh housing associations. Her role covers all aspects of finance, treasury, procurement, technology, data and business improvement. She is also the Group Company Secretary. She has been a qualified accountant for nearly 30 years and has an MA in Leadership and Management. With a professional background in housing, education and manufacturing, Lisa champions value for money and how technology can drive business efficiency.

Gareth Thomas

Executive Director for People

Gareth is a highly experienced HR professional with over 20 years of expertise in leading organisational effectiveness through embedding culture and values. He joined Trivallis in May 2025 having previously worked with Wales and West Housing, Royal Mail and Arriva Trains Wales to create a positive and inclusive workplace culture.
Passionate about social values and people-focused leadership, Gareth chairs Disability Sport Wales, promoting inclusive access to sports, and has worked for the Brandon Trust in empowering people with learning disabilities and autism. He strongly believes that when people feel valued and supported, they can thrive and drive success.

Related pages

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Our Board

Our Board is responsible for approving any major strategic decisions and making sure they’re right for Trivallis and our tenants.
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Our news

Stay updated on the latest happenings, exciting events, and important announcements.

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Our values

Being a values-led organisation means we make decisions and behave based on important principles. It guides how we treat each other, our tenants, and our community.

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