meet the team



Brian Holmes CFRE FFIA


I love what I do. That's the reason I've been doing it for more than 20 years.

I love that I've been able to help so many amazing people, organisations and causes raise millions of dollars. I love that I meet so many remarkable people with a spirit of generosity. I love that every day I get to help successful people become significant people by expanding their philanthropic experience.

The industry awards, recognition by my peers and my term as Chairman of Fundraising Institute Australia are all valued but tomorrow morning I get another opportunity to make a significant difference by bringing big givers and wonderful causes together again. That's what I love.

Craige Gravestein CFRE FFIA MFINZ


There are not many people who get the chance to help the homeless, find a cure, save the planet or feed and clothe millions of the world’s poorest people.

As ‘Chief Big Gifts’, I’ve spent the past 21 years facilitating and raising hundreds of millions of dollars in partnership with hundreds of not-for-profits. The success of that work has contributed to transformational changes in healthcare, education, animal welfare, religious and social services. Passing that experience on to others ensures it lives on.

Having the money empowers others to act.  My passion is seeing high net worth individuals experience the joy of giving and the fruit of their hard work and generosity.


Erica Myers-Tattersall MBUS (Marketing) FRSA MFIA

Director, Xponential Fundraising

From small, local charities to large, international organisations I use nearly two decades of fundraising and marketing expertise to find those nuggets of gold within, that help make the ordinary… extraordinary. 

Like a bridge I bring together funders and visionaries together to make the world a better place for all of us.

Roewen Wishart CFRE FFIA

Director, Xponential Strategy

It feels personally rewarding to see the chemistry happen between great donors and great causes.  I take pride in helping not-for-profits to building great fundraising teams, and great relationships between not-for-profits and significant donors. For over twenty years, I’ve helped to create the difference which transformational major gifts bring.

 Smart planning, clear analysis, and committed leadership make all to the difference to an organisation’s growth.  Our sector has a special place in the world to solve the hardest problems and meet the deepest needs. Passionate people, innovation and responsiveness – from the local to the global – make this possible.  I enable organisations to get the resources to do this. 

Terri Sheahan CFRE EMFIA

Director, Xponential Communications

In my 20-something years as a specialist writer for the non profit sector, I have been privileged to work alongside many life-changing organisations and exceptional fundraisers.  And it is a privilege: finding the right words to motivate people to give, and witnessing the transformational impact of their philanthropy on the world around us!

I have long been fascinated by what motivates generosity, and that curiosity helped to drive the recent development of Xponential’s Wheel of Philanthropy.  That curiosity, and the joy of watching great visions come to life, continues to fuel my passion for big gifts fundraising.  

Sandy Fuller MFIA

To assist great causes realise their dreams is a motivation in itself to be the best that I can be; to bring professionalism, enthusiasm, creativity and expertise to each new client.

For more than 10 years, I found it incredibly rewarding to work amongst truly extraordinary people in their endeavours to raise considerable funds to support their vital projects and programs:  education; health; youth; arts; churches; historical preservation/rebuilds; medical research; and social service organisations are some of the diverse organisations I have been privileged to assist in my career to-date.

Bree Jopp MFIA

I love knowing that what I do is making a difference to the lives of people – here and around the world.  The two fundamental elements that excite me about my job are:

Engaging with people.  Throughout my career, I have had the honour of working with some powerful and inspirational individuals.  Whether they are financial supporters or beneficiaries seeking support, I am always warmed when meeting people who are so kind-hearted, positive and motivated.

Watching the numbers.  I feel a real sense of achievement and pride knowing that the response rates, email open rates, page views and even shares, likes and comments on social media are all beneficial in helping the cause.


Shelana Silver DipM MEdPlus

I have over 20 years’ experience in the field of targeted fundraising, where I have had the privilege to see dreams and visions realised.

My great passion is to enable philanthropists to make a difference, leave a legacy or change the life of an individual by matching their needs to those of a diverse range of individuals and communities. I couldn’t think of a more rewarding profession that being able to help facilitate that.


Sarah Stuewe CFRE MFIA

 A strong motivational force in my life has been to work with leading organisations that effect change and positively impact people’s lives. For over eight years I have been privileged to work with not-for-profits in Australia, the UK and Canada.

I am extremely passionate about fundraising; it is a profession that requires resilience, collaboration, problem solving and outstanding interpersonal skills. You must have the tenacity to make the “ask” and the self-discipline to stay silent while it is carefully considered. It is so rewarding to help my clients achieve their goals and secure the resources they need to achieve their mission.




Grainne Tierney MComm MFIA

After 10 years in corporate marketing, where I managed cause-related campaigns, CSR initiatives and partnerships with a range of not-for-profits in Australia and the UK, it was a natural transition and desire to work more closely with the NFP sector. 


I am passionate about utilising my skills for a social cause and I am fortunate that my role at Xponential offers just that.  From engaging with prospective donors to connecting with inspiring individuals who have benefitted directly from fundraising – it is all in a day’s work, which is challenging, meaningful and above all, impactful.

Michelle Varcoe MFIA

love working with clients to achieve tangible outcomes.  For many years I have been actively involved in the not-for-profit sector where am fortunate to meet and work with so many interesting, generous and passionate people.  

I am excited to play an important role in turning ideas into reality, and connecting people with opportunities to contribute and make a significant difference for wonderful causes.  It is both professionally and personally rewarding to know that my job leads to positive change.

Tessa Irwin MFIA

I have a passion for creating positive changes for marginalised and less fortunate people of the world. Working at Xponential Philanthropy offers this and so much more, helping donors connect with a huge range of organisations provides funds that are vital to the forward movement of not-for-profits. Without funding, not-for-profits cannot continue and expand their life changing work and programs.

Having worked in both not-for-profit and corporate sectors, I have found that a connection to the purpose of the organisation is very important for satisfaction in my work. It is motivating to have such purpose behind my work and to know that I am contributing to positive outcomes for those people the not-for-profits are serving.

Emma-Laureen Huijs AFIA

It’s a privilege to work in an environment that generates so much positive energy. Xponential is an organisation that tries – and succeeds – to make this world a better place and I’m proud to be part of this team effort.

It is incredibly rewarding to help non-for-profit organisations realise their visions by providing them with support and guidance on their journey to success. Working amongst many great fundraising professionals in the Xponential team, I know that the opportunities for change and improvement are endless. I enjoy witnessing people who give transform lives in all corners of our society with the impact of the programs and organisations we work with. 

Rose Etherton

I enjoy working with a team of people who are working to make this world a better place.

I have worked many years in the commercial side of life but the time came when I wanted to be a part of something that was all about helping Not for Profit organisations achieve their goals.

It’s so good to be playing my “behind the scenes” part ; my role is functional yet important.  I get excited when I find out who are new clients are and what they are wishing to achieve.  When I hear about the pledge of a big generous donation it’s the best feeling ever!

Richard Onanjiri EMBA BSc

The opportunity to be part of this wonderful team of fundraising professionals is invaluable and the opportunity to contribute towards making the world a better is what I really relish.

I am therefore passionate about delivering the utmost in service that puts smiles on the faces of our clients. It is a privilege to be working in the background at Xponential to provide that refreshingly different service experience to our clients.

Being part of Australia and New Zealand’s leading fundraising consultancy and seeing my contribution make a change in the lives of the underprivileged is both professionally satisfying and emotionally heart-warming.  

Olivia Gravestein AFIA

At the start of my professional career, working with a team that strives to help not-for-profit organisations is one of the most rewarding experiences at Xponential Philanthropy. I enjoy the challenge of learning and gaining new skills whilst working in my dual role as a Personal Assistant to the Director and a Campaign Support Officer (Research).


I am pleased to be working with the charity sector and to expand on the involvement I currently have with charitable organisations both as a volunteer and a donor.