greenoakha - board and senior team

board and executive team


Board of Management 

Our Management Board is formed of a maximum of twelve members. Skills represented on the Board include finance, housing design and development, risk, housing management, legal, asset management and sustainability. Our Board recognises the importance of robust governance and Members undertake annual appraisals of individual and collective performance. 


Board Members

Martin Large


Retired CEO

Chair of the Assets & New Business Committee and Member of the Finance, Risk & Audit Committee

CEO to Dec 15 of GLE Group, a leading SME focused property regeneration and business services organisation. Significant senior management and board experience. Former NED at Pocket Living Limited and Hexagon Housing Association. Current NED and chair of Assets and Development at Selwood Housing Society Limited

Jane Vessey CFA

Vice Chair

Fund Manager and Investment Director

Member of the Finance, Risk & Audit Commitee 

Jane is qualified as a CFA (Chartered Financial Analyst), and has 18 yrs experience as fund manager and investment director in Europe and Asia.
She has a strong technical background with experience in both developed and emerging markets. Non-executive experience in fund management and voluntary sectors and a wide knowledge of investment industry, and Lectures on investment on Masters courses at leading business schools.
She is currently Owner and MD of Wentworth Advisors; NED and Chair of Risk Committee at Margetts Fund Management; and Governor of Tolworth Girls’ School & 6th form. She previously served on the Risk and Audit committee at Inquilab HA, Board member of CFA UK in London.


Peju Fabunmi

Board Member

Hosuing Development Consultant

Member of the Assets & New Business Committee

Peju has over 20 yrs involvement in the housing sector as a Manager and Consultant with specific experience in planning, property development and acquisitions.
She has worked with several HAs including L&Q, Notting Hill, Threshold, Home Group, Swan, Metropolitan, East Thames Chapter 1 and Hyelm Group. Relevant experience and skills include options studies, viability appraisals, property acquisitions, maximising planning consents, progressing stalled projects.
Peju initially qualified as Urban planner and has post graduate diplomas in both Urban Design and Property Development & Planning (RICS accredited). She is a career mentor and CIH Chartered Member. and has attained full Chartered Status (experienced route). She is also a Member of the Association of Project Managers.


Louisa Martin

Board Member

Executive Director & Board Advisor

Member of the Finance, Risk & Audit Commitee

Louisa is an experienced Capital Markets specialist with knowledge of debt and equity markets, economic theory, and trading/ investing/ asset management theory and practice.
She has a background in finance, risk and regulatory frameworks, and has held senior roles and Board advisor in consumer facing, heavily regulated financial and property industries.
She holds over 15 years’ experience in branding, developing and launching SMEs. She was previously a Member of the Toronto Real Estate Board.She is an ex Director at Citigroup and ABN AMRO, and held senior roles at Societe Generale and Daiwa, advising asset manager clients on investment, risk and strategy. She was Director at a Toronto-based real estate brokerage and advisory, and founded an insurance start-up. A Director of BIGbleu, a London-based property business, and is a Trustee and Committee Chair at Citizens Advice Brent.

Gordon Mattocks CIPFA

Board Member 

Retired Accountant

Chair of the Finance, Risk & Audit Commitee

40 years’ experience in public sector finance and audit. Worked in new towns, local government, higher education and latterly for 15 years in social housing. Member of various boards/ audit/ risk/ finance committees, including currently Board member of Inquilab and Ekaya housing associations.

Audit committee member of the Chartered Institute of Public Finance and Accountancy (CIPFA) and Treasurer/ Executive Committee member of the Housing Internal Audit Forum, the trade association for housing internal audit.

Julia Tyson

Board Member

Executive Director

Member of the Human Resources & Remuneration Committee

Julia holds 30 years of large corporate experience at Executive Director level with expertise in HR, strategy and Governance and a passion to use business for good.

Significant roles include GHRD at HKA, HR and Communications Director with LV Group and Group HR Director with Wates Group Ltd.
Currently NED and Chair of Remuneration Committee at UFI Charitable Trust and Trustee Governor and Chair of Remuneration and Staffing Committee at St Michaels School. Previously NED and Member of Remuneration and Audit Committee at Gibbs and Dandy PLC.
Currently Trustee Governor and Chair of Remuneration and Staffing Committee at St Michaels School.
Previously NED and Member of Remuneration and Audit Committee at Gibbs and Dandy PLC.



Diana Kingdon FCIS MBA


Chief Executive/Secretary

Diana has over 30 years’ experience in senior management roles. She has considerable experience of property management and support services, and strategic planning, financial and company secretarial matters. In her current role, she is responsible for working with Greenoak’s Board to set the strategic direction of the organisation.

Adrian Buffery MSc


Director of Development

Adrian is responsible for leading on new business and development and oversees our asset management re-investment. He has extensive experience in housing development and planning in Housing Associations and Local Authorities. He is experienced in policy and service delivery in a variety of voluntary and public bodies.

Adrian’s work at Greenoak has sought to ensure that our homes are built to meet priority needs and maintained to a high quality standard including energy efficiency. He leads on new business ventures and partnerships and provides technical support to our asset management team.

Berni Rigby

Senior Management Team

Director of Finance

Berni is a Financial and Management Accountant and has had over 30 years’ accountancy experience including 20 in the NHS. 

As Director of Finance his overall responsibility is for the strategic leadership and overall management of Greenoak's Finance team and ensuring that the appropriate financial and corporate services strategies, plans, processes and controls are in place. 

Karen Novell MRICS

Senior Management Team

Operations Director

Karen is responsible for asset management and maintenance services, housing management, resident involvement, health & safety and compliance.  Her role involves strategic leadership and overall management of our operations staff and ensuring that the appropriate customer service strategies, plans, processes and controls are in place. She also manages Greenoak’s Direct Labour team of five multi-skilled operatives. They cover most response repairs, voids, and replacement of kitchens and bathrooms, and achieve very high satisfaction feedback from tenants.

Karen is a Chartered Surveyor with over 30 years’ experience in social housing. She has worked mainly dealing with repairs and maintenance, planned works and new build but has also worked in housing management so has a good understanding of all aspects in dealing with staff and tenants.