Matthew is a certified public accountant specialised in VAT. He has been specializing in VAT since 2008 and has been involved in complex VAT assignments both within and outside of Malta. Matthew, a member of the Malta Institute of Accountants is also a part-time lecturer with the Malta Institute of Taxation.

Matthew Zampa is also the first Maltese to successfully complete the Expert in EU VAT degree, a degree administered and awarded by the VAT Forum, an international partnership of indirect tax specialists, founded in 1999. He is also a joint author of the European VAT Handbook, a manual providing essential information about VAT in Europe.

Matthew forms part of the indirect taxation committee of the Malta Institute of Taxation and is one of the council members of IFSP.

Christabel Spiteri, is an ACCA Qualified Accountant who has been working at Zampa Debattista for over seven years and has been specialising in VAT for over five years. She currently holds the role of VAT Leader and is responsible for the VAT Compliance Division of the firm. She also forms part of the management team of the firm with a particular focus on quality at large. 

Christabel, has gained her technical experience lecturing through ZD Academy and other external institutions. She is currently reading for the EU VAT Expert Degree, a degree awarded by VAT Forum, a partnership of international VAT experts registered in Belgium.