Joe's clients include: African Banking Corporation, AMR Research, Axalto, Barclays Bank, BMC Software, BT Global, BUPA, Business Insights, Churchill College Executive Programmes, Clore Leadership, Contax, CRAC, Credit Suisse First Boston, CR2, EPTDA, First National Bank, Forrester, Hewlett-Packard, House of Performance, IBM, Ideas UK, Innovateurs, Institute for Leadership and Management, J.P. Morgan, Lafferty Group (World Cards Intelligence), The Law Society, Lexmark, MasterCard, MasterFoods International, MEDEA, Microsoft, Misys International, NCR, NESTA, Parametrics Technology Corporation, PIC Solutions, Royal & Sun Alliance, RUSI, RWE N Power, SAPPI, Scottish Housing Association, Shell, TNS Sofres, TowerGroup, Troika Dialog, UBS, UK Graduate Program, Visa International,  and the conferences ABTEC, ASHRM, Banking Technology Africa, AITEC, Payments Middle East and MEFTEC.

"Joe made a perfect chairman for the conference, managing the timing without it showing – linking our speakers and providing professional advice and guidance. Could not be faulted." John Twedell, PR and Corp Comms Manager, Lexmark Europe.

"The Visa Business School team are all extremely happy with this year's event, … and we would like to thank Joe DiVanna for his personal contribution to our shared success." Lisa Morford, Head of the Visa Business School team, Visa International.

"Joe DiVanna's thoughts on both the continuity and the discontinuity of leadership challenges in the distance based environment were, as always, brilliant and insightful." – David Thomas, CEO, CRAC (Careers Research and Advisory centre, Cambridge, UK).

"DiVanna's knowledge of the history of Cambridge and in particular King's College made it a most informative and interesting evening." Alan Blake, Conference Organizer, Institute of Directors, Eastern Branch.

 "Joe's session was excellent! Several delegates commented that his session was very inspiring and thought-provoking, which was exactly what we were trying to achieve". Wendy Martin, Visa International.

 "Joe DiVanna's lecture was most interesting. It was refreshing to hear a business presentation that brought the theories to life, I felt talked to, rather than lectured at, and I think that this went down really well with the participants." Katie Latimer, Programme Manager, Careers Research and Advisory Centre

 "DiVanna highlights the need for companies to constantly question whether their organizations are optimally organised to provide value to customers in an increasingly global competitive marketplace." Daragh O'Byrne
Solutions Manager, Misys Retail Banking Systems.

 "Joe DiVanna illuminates the fundamental opportunities for the Financial Services Industry to reinvent itself." David Sutherland, Managing Director, The Business Innovation Consortium.

 "Joe DiVanna's sweeping review of technology and business contributes both historical perspective and strategic context. In particular, he is absolutely on message when he talks of the growing importance of relationships in business processes, an omission that is too often made." Arif Zaman, Global Market and Industry analyst, British Airways