ACF staff

Carol Mack OBE, chief executive

Carol is responsible to the board for the leadership and management of ACF, and for ACF’s external relations. Carol leads on the delivery of all of ACF’s strategic objectives, ensuring that ACF strengthens and supports foundations to aspire to and achieve excellent practice so they can rise to the challenges of our times. [email protected] or via [email protected]


Laurence Delcroix, executive assistant

Laurence supports Carol in all aspects of her work and ensures the effective functioning of the executive leadership team. Laurence’s role is to ensure that the executive leadership team is run with empathy and excellence in accordance with ACF’s values, with a high standard of service and support to Carol and ACF’s trustee board. [email protected]



Gemma Instrall, director of membership

Gemma oversees ACF’s membership, partnerships, communications and events functions. She is responsible for championing the needs of our members and taking a strategic lead in ensuring ACF's services support foundations to be diverse, vibrant and effective, working together for social good. [email protected]


Katie Bower, events manager

Katie leads on the planning, scheduling and delivery of ACF’s learning and events programme. This includes ACF networks and their online communities, training and learning programme, roundtables and forums, conference and other emerging learning and development opportunities to ensure ACF members and delegates are supported to be diverse, vibrant and effective in the way they use their resources. [email protected]


Gemma Cartwright, head of investment practice and partnership

Gemma leads ACF’s investment practice and partnerships programme, including activity related to the Stronger Foundations investment strand, the Social Impact Investors Group (SIIG), and sharing expertise from ACF’s Official Partners with members. [email protected]


Trevor Horsewood, network development manager

Trevor is responsible for the development and delivery of ACF’s member-led networks, supporting the cultivation of vibrant communities of practice and strengthening connections across and beyond the sector. [email protected]


Jo Hunt, head of marketing and communications

Jo is responsible for ACF’s marketing and communications. She has responsibility for developing our brand and messaging, and oversees ACF communications channels, including email, website and social media. [email protected]


Sherri Hoppen, senior marketing and communications officer

Sherri supports the team with regular marketing and communications activity that build ACF’s brand, reputation and reach. She is responsible for the preparation of email communications, website maintenance and ACF’s social media channels. She also supports the head of marketing and communications with implementing the ACF’s brand strategy and marcomms planning. [email protected]    



Natasha Robinson, head of membership

Natasha is responsible for managing the recruitment, engagement and retention of ACF’s members, and ensuring membership thrives and is commercially sustainable, in line with our strategic objectives. She also has a focus on ensuring members receive a compelling membership offer. [email protected]


Emma Burkinshaw, senior membership development officer

Emma supports the delivery of ACF membership recruitment, identifying and stewarding potential members alongside developing other activities to promote and grow membership in line with ACF's strategic objectives. [email protected]


Jumi Sekoni, senior events officer

Jumi leads the pre-event planning and delivery of all ACF’s network meetings, professional development programme and other ad hoc events. She is responsible for liaising with speakers, facilitators and convenors, as well as assisting participants and members with event-related enquiries. Jumi also supports the delivery of policy and investment events. [email protected]


Hannah Uprichard, head of learning and networks 

Hannah provides leadership and operational oversight for the events team. She is responsible for the strategic direction of ACF’s events, learning and networks portfolio and leads the development of new initiatives and collaborations in this area. [email protected]


Policy, practice and research

Catherine Seymour, director of policy, practice and research

Catherine’s role is to shape ACF’s thought leadership on the role and practice of foundations and to work with stakeholders to ensure a positive operating environment for foundations. Catherine is responsible for catalysing change in foundation practice and demonstrating their positive impact through our policy, research and media work. [email protected]


Jim Cooke, head of practice

Jim leads ACF’s work supporting foundations to aspire to and achieve excellent practice. This includes ensuring that our Stronger Foundations framework continues to take account of new developments in foundation practice, and developing resources that respond to ACF members’ needs as they work to strengthen their practice. Jim also leads the Funders Collaborative Hub. [email protected]


Francesca de Munnich, head of policy 

Francesca provides policy intelligence and analysis, identifying opportunities to influence policy, regulation and legislation that would enhance the operating environment for foundations. She supports and guides ACF members on external developments that affect them collectively and works to strategically promote the foundation model of philanthropy. [email protected]




Jade Yap, senior research manager 

Jade is responsible for ACF’s key research projects, bringing new data and insights on foundations and funding practice to ACF’s membership. This includes building and strengthening the evidence base to promote the foundation model of philanthropy more widely. [email protected] 


Rachel Heydecker, senior policy and engagement officer 

Rachel supports ACF’s policy, practice and research programme, and manages the Funder Commitment on Climate Change (FCCC). Working alongside FCCC signatories and ACF members, she highlights the part foundations can play in addressing the causes of climate change and supporting adaptation to its effect, to inform and motivate the foundation sector and beyond. [email protected]  


Finance and operations

Sheikh Tashfeen Islam, chief operating officer designate 

Tashfeen focuses primarily on delivery of people and culture policies and processes, focusing primarily on people strategy, wellbeing, organisation culture, learning, recruitment, induction and HR policies. Over a period of twelve months, he is gradually taking over IT, Legal, Governance, Operations and Finance responsibilities to transition into the Chief Operating Officer. [email protected]


Natasha Kousseff, head of finance

Natasha is responsible for ACF's finance function and maintenance of our member database, and provides financial support to the wider team and board to support decision-making and planning. Natasha's role helps ensure that ACF thrives and is sustainable in supporting members over the longer term. [email protected]


Caroline Langdell, senior finance and data officer

Caroline supports the day-to-day administration of ACF’s operations team, including finance and membership data management processes. Caroline helps to ensure our finance processes run smoothly, that members’ information is as accurate and up to date as possible, and that our website and CRM support members and staff effectively. Caroline also supports member services by being the first point of contact for members. [email protected]