About MDD

We make the fintech and banking relationship work.

MDD sits at the intersection of fintech and banking. Fintechs increasingly work with banks; banks are increasingly responsible for the third-party risk that flows from the fintechs using their rails. We exist to make that relationship work, by orchestrating safeguarding, custody, payments and accounting so both sides can operate with confidence.

The team

The people you will actually deal with.

We work with a few firms at a time and know them properly. The people who assess you are the people who advise you and sit with your banker.

01Barbados
Dr. Jonathan Brathwaite

Dr. Jonathan Brathwaite

PhD, TEP

Co-Founder and Managing Director

Jonathan is an international tax lawyer who has worked independently for over twenty years in London and across the United Kingdom, USA and Barbados, with clients connected to Barbados, Canada, Mexico, Brazil, the United States and Switzerland.

Jonathan is currently working in US and Canadian fintech, US and cross-border payments, and film production and real estate development. He is also working on the buildout and growth of a Canadian regulated financial institution engaged in digital payments and assets.

He specialises in compliant, commercially workable cross-border tax structures for owner-managed international businesses, investment funds and private clients, drawing on a wide range of corporate, trust and business solutions, and has led service teams to deliver on the advice given.

Jonathan holds a Master of Laws (LLM) in International Tax Law from the University of Florida's Fredric G. Levin College of Law and has completed a Doctor of Juridical Science (SJD) in International Taxation at the same institution. He also holds an LLB, an MSc in Mathematical Finance from Imperial College London, and a BSc in Business and Computing from Brunel University. Jonathan is an Attorney at Law in Barbados, was called to the Bar in England and Wales, and is a member of the Barbados branch of the International Fiscal Association (IFA).

02Barbados
Marilyn Brathwaite

Marilyn Brathwaite

Co-Founder and Director of Administration and Partner Relations

Marilyn spent seventeen years at a multinational corporation across the UK, Ireland and EMEA, managing a P&L in excess of USD 500M with responsibility for contract management, SOX corporate governance and financial disclosure.

For the past six years she has worked with owner-managers on international business and wealth structures, trusts and operating companies. That combination, large-company financial governance alongside close work with owner-managers, is what shapes the group's standard for how a structure should be run once it is in place.

03Canada
Alanna Brathwaite

Alanna Brathwaite

Head of Commercial Operations

Alanna leads business development in Canada, advising small to medium-sized businesses on international tax consultancy and cross-border structuring. She has a particular focus on trust companies and fintech structuring, helping money services businesses and payment platforms build compliant, bankable structures that protect end-user funds and support sustainable growth across the Americas.

Alongside her advisory work, Alanna brings a distinctive engineering discipline to client engagements. Trained as a chemical engineer, she spent several years in consulting and project management, delivering complex, high-capital projects in Canada. That experience shapes her structured, execution-focused approach to structuring mandates, where precision and follow-through matter as much as the plan itself.

Alanna holds a bachelor's degree in Chemical Engineering and is based in Canada, where she is the principal point of contact for Canadian clients.

04Barbados
Rianna Holas

Rianna Holas

Business Development Manager

Rianna leads private-client engagements, drawing on over eight years' experience in international corporate services, trust and estate administration, and regulatory compliance. She leads AML and CFT compliance for the firm, work that sits close to the compliance obligations an MSB carries under the RPAA.

She also advises on company formation, corporate governance and company administration, and serves as a director on a number of client companies, overseeing statutory compliance, board governance and regulatory affairs. Alongside that, she guides individuals and families relocating to Barbados through property, immigration and settling-in support.

Rianna holds a bachelor's degree in Hospitality and Tourism Management and is a member of the Society of Trust and Estate Practitioners (STEP) and the Barbados Association of Compliance Professionals.

The partners behind the structure

We coordinate. The regulated work is done by regulated firms.

We name them when we speak to you rather than on this page, and the division of responsibility is the same either way: they hold the funds, we build and operate the structure around them.

The safeguarding trust company

A licensed Canadian trust company, provincially regulated, and the party that actually holds end-user funds in trust. Because section 9 of the RPAA excludes prudentially regulated entities including provincially regulated trust companies, it can perform the very functions that bring its clients into supervision without being drawn in itself.

We hold a robust relationship with its owners, which is why we are able to advocate for clients, negotiate, and get bespoke structures for complex fund flows agreed and built, rather than passing paper as an arm’s-length introducer would.

The accounting capability

End-user fund accounting is run with a Canadian CPA practice that understands both MSB operations and trust accounting, a combination that is genuinely scarce.

Who does what.MDD structures and operates the evidence layer but does not hold funds; a licensed Canadian trust company is the trustee and holds end-user funds; a custodian bank and PSP handle custody and movement; Mithril International and Mithril Tax Law provide structuring and formal opinions; end-user funds sit only inside the trust.
Figure F7Who does what. End-user funds sit inside the trust company boundary, and nowhere else.

Mithril International and Mithril Tax Law

Sister firms under common ownership. Where a client needs the structure above the Canadian entity designed, or a formal legal or tax opinion behind it, that work is done by those firms rather than by MDD.

Massive Distribution Dynamics, Mithril International and Mithril Tax Law share common ownership. Between them they cover the structure, the legal opinion behind it and the safeguarding platform that runs it.

Mithril International

Cross-border structuring and international tax consultancy for owner-managed businesses, built on the Canada to Barbados and United States to Barbados double tax treaties.

Where an MSB needs the structure itself designed, a Barbados subsidiary to carry low-tax profit and cheaper accounting, Mithril International does that work.

  • Cross-border structuring
  • Corporate services
  • Private client advisory
Mithril Tax Law

A boutique international tax law firm in Barbados, advising owner-managers and their families on holding assets and profits across borders.

Where a structure needs a formal legal or tax opinion behind it, that opinion comes from licensed counsel rather than from a consultancy.

  • International tax law
  • Trusts and estates
  • Legal opinions

One integration. Safeguarded, banked, reconciled.

Talk to us about integrating with the orchestration platform, or about any single service in it.