Our Founders

The founders of MMP have worked together for more than 13 years in technology tax practice, providing expert technology tax consulting to large international corporates and SMEs.

David Marshall has been involved in the technology tax landscape since it first emerged in the UK in 2000 and Alexis Marz is one of the country's most experienced R&D Tax Relief consultants having spent more than thirteen years in R&D Tax with many hundreds of claims approved.

Together, the MMP founders have managed countless hundreds of client claims through to approval by HMRC, with claim values ranging from many millions of pounds to tens of thousands of pounds.

The philosophy and values of MMP is to represent the best interests of their clients with HMRC while respecting and promoting government policy.

becoming an expert in almost anything requires
literally years of work

- Earl Hunt. President of the International Society for Intelligence Research -
David Marshall. Director MMP tax

David Marshall


David Marshall is an experienced business professional, having held C and board-level positions in many different entities and sectors. For the last 13 years he has worked solely in the R&D Tax field having skills in both technology and the tax aspects of making successful R&D claims.

In 1996 he co-founded UK software start-up Greenwich Mean Time with a team of three others. It became a global success story in four years, achieving a channel of 2,000 partners, in excess of 100 staff and £22M in revenues. Independently rated as the fastest growing software company in the USA, David helped manage a trade sale exit in 2000 to Sempres. Appointed to the board, he assisted it to an IPO.

Prior to founding MMP, David worked as a Director of an R&D tax boutique before joining Alexis, in managing the UK division of a Tax consultancy firm.

During his career, David's roles have included: European Programme Director of a division of TYCO; Interim Vice President at Kewill Systems (listed on the London Stock Exchange); head of European business development at a subsidiary of Modine (listed on the New York Stock Exchange); and UK Sales Director of Apax-backed firm Red-M. He has managed trade sale exits, reversals and an IPO.

David holds a Masters of Business Administration, majoring in Corporate Finance, a degree in Management Studies, majoring in Finance; and a Higher National Diploma in Communications Electronics.

In his rare spare time David loves sailing, riding his Harley Davidson and going to dodgy 70's rock gigs with his grown up children.

Alexis Marz. Director MMP Tax

Alexis Marz


Alexis Marz is one of the country's most experienced R&D Tax Relief consultants having spent more than twelve years in R&D Tax with many hundreds of claims approved. She leads a team of engineers and finance experts responsible for realising hundreds of millions of pounds in tax relief for some of the UK's largest companies.

Alexis holds a Masters of Science Degree in Engineering from École National Supérieure de Techniques Avancées (Grandes Écoles) in Paris, and a Bachelor of Science in Chemical Engineering from the University of Michigan. She also holds an Investment Management Certificate from the Institute of Chartered Financial Analysts and holds an MBA from London Business School.

Previously, Alexis worked as an engineer for General Electric in the United States and prior to that was a researcher in a biotechnology start-up in Cambridge, Massachusetts and at the Kresge Hearing Research Institute at the University of Michigan Medical School.

Alexis lives just outside London where she is an avid triathlete and marathon runner.