A long-term governance partner for cross-border wealth
Diadem Consulting Group Limited is based in Hong Kong, providing tax governance, structural design and family-office services to cross-border families and business owners.
What we do—and where we draw the line
Full Scope of Services
Cross-border tax governance, family-office governance, cross-jurisdictional structural design and professional-firm coordination—four services sharing one core purpose: making the critical judgements for our clients across multiple jurisdictions, and coordinating licensed professional firms to carry them out.
Operating Principles
We hold to three lines we will not cross: we make no promises on outcomes decided by third-party authorities; we do not undertake filings or attestation that must be performed by licensed firms; and we accept no commissions or referral fees from executing firms. The value of governance rests on independence and restraint.
Diadem Group · governance-platform entity
We stand only
on your side.
Independence is what makes governance possible. The three commitments below never change, for every client we serve.
We manage structure, rules and coordination—we never manage your money or handle your funds on your behalf.
Our income comes solely from the governance fee you pay, with no referral commissions from any institution—no conflict of interest.
Governance design and the selection of firms are guided by one benchmark alone: the family's goals.
Governance and execution are kept separate: the judgement rests with us, while filing and attestation are completed by independent licensed firms—a balance of checks that lowers your risk.
Diadem Group
A holding group focused on cross-border services
Diadem · helping your money, business and future choices move abroad with confidence and peace of mind
Diadem is the governance-platform entity within Diadem Group. The Group has spent years building depth in cross-border services—spanning US tax filing and ITIN services (under the CAA certification system), US company formation and annual maintenance, trademark and brand protection, and cross-border technical services. This means every judgement made at the governance level is backed by a mature execution network ready to deliver.
Governance and execution sit in separate legal entities, contract independently and each bear their own responsibility: the Group ecosystem offers depth of resources, never a blurring of accountability.
Our Values
Fiduciary Duty
What clients entrust to us is long-term judgement; we treat every recommendation with a fiduciary's care.
Independent Standing
We sell no financial products and take no referral fees from executing firms—we stand only on the client's side.
Clear Boundaries
Governance and execution are kept separate: what we do and don't do is set out up front, in black and white.
The Long View
We accompany families through changing regulations and circumstances on an annual governance rhythm, rather than a one-off deliverable.
Let's talk through your cross-border arrangements
The first consultation is free and free of any sales pitch—let's start by getting your situation clear.
Book a consultation