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Philanthropy
consulting
Helping philanthropists, families, not for profits and businesses
design and deliver truly transformative projects
How Boon can help
Supporting individuals, families & foundations
Wherever you are in your philanthropy journey, I can help you decide what type of philanthropy will best align with your business, wealth or succession goals whilst having the greatest impact - and being the most enjoyable.
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philanthropy strategy
From conception and planning through to setting impact measurements and milestones. This also includes helping to select and set up the right charity parter, and helping you figure out the right way to give, whether that's a DAF, a foundation or anything in between.
partnerships and connections
Working with my extensive network of experts, philanthropists, not for profits and charitable organisations, I help you make the connections that matter so that your philanthropy can have the biggest impact.
Supporting companies and not for profits
Working with corporates on their sustainability and CSR strategies as well as with not for profit organisations to help define and deliver their high value fundraising strategy.

who is Boon?
Sianne is an independant impact and philanthropy consultant, she helps to bring philanthropic vision into reality, helping Corporates, Families and Philanthropists achieve their impact goals. She is a STEP qualified lawyer with over twenty years experience working and consulting in the commercial and third sector with companies, individuals and not for profits.
Sianne was formerly Chief Impact Officer at Maanch, an Impact consulting firm where she worked with corporates to embed sustainability programmes. Before then, Sianne worked at Cancer Research UK, the largest charity in the UK, heading up philanthropy and strategic partnerships. She started her career as a lawyer in South Africa at Linklaters, embedding human rights into businesses. Sianne also has a Post Graduate diploma in Psychology with a focus on using coaching to deliver change.
Sianne is Chair of the STEP Global Philanthropy Advisors Special Interest Group. She sits is on the Advisory Committee of the UN Global Compact UK and acts as an advisor on UBP's Biodiversity Restoration Impact Fund. Sianne sits on the board of the music production company Serious and she regularly gives keynote talks at philanthropy and private client conferences and events. She is also a Trustee of both Save the Rhino and Mosaik Education a charity helping refugees access tertiary education.
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Why the name Boon? When Sianne was admitted to the bar in her native South Africa, the presiding Judge advised "may you always be a boon to your clients". Sianne took it to heart, and has since been determined to have a purposeful career that integrates commercial, legal and philanthropic interests.
SOME ORGANISATIONS I WORK WITH

















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+44 (0)7947207291