Senior judgment for consequential decisions.
Jonathan K. Walsh advises crypto exchanges, fintechs, money services businesses, charities and NGOs on CTF systems that do not fit a conventional bank template. A former FinCEN senior adviser on countering the financing of terrorism, he works at the intersection of financial intelligence, digital-asset analytics, payment operations and humanitarian delivery. His practice emphasizes controls that identify genuine risk without treating technology, geography or nonprofit status as a substitute for facts.
Jonathan combines on-chain and off-chain evidence. Wallet exposure, clustering and vendor labels are evaluated with customer identity, source of funds, transaction purpose, counterparties, timing and known service behavior. For charities and NGOs, the same discipline is applied to donors, partners, beneficiaries, procurement, cash delivery and monitoring. He maps where the organization can intervene, writes clear escalation standards and tests whether investigators document why an indicator changes a decision.
On-chain visibility is powerful, but attribution still requires evidence about control, timing, services, counterparties and the customer behind the wallet.
How Jonathan works
Jonathan’s matters often involve fast-moving data and incomplete attribution. He helps teams resist binary conclusions while taking proportionate action. An alert may support enhanced review, a restriction, a report or government contact, but the basis should be recorded and revisited as evidence develops. That approach improves defensibility and reduces unnecessary exclusion of lawful customers, innovation or humanitarian activity. When enforcement is already underway, he works with the defense team to explain what the analytics show—and what they do not.
Every matter begins with a defined scope, conflicts clearance and an agreed communications protocol. The team identifies urgent deadlines, relevant agencies, custodians, systems and jurisdictions. Confirmed facts are separated from reasonable inferences and open questions. That distinction is maintained in board materials, government submissions and internal work product so the client can make decisions without confusing an investigative lead with a legal conclusion.
Jonathan works closely with the firm’s defense, compliance, sanctions and policy leads. This integrated approach is important because one fact may be viewed differently under the material-support statutes, the Bank Secrecy Act, OFAC authorities, a contractual risk standard or a foreign-law restriction. Workstreams are coordinated, while privilege, professional duties and local-law responsibilities remain clear.
Focus areas
- Crypto-exchange and fintech CTF risk assessments and control frameworks
- Wallet screening, blockchain analytics, mixers, bridges and unhosted-wallet risk
- MSB and remittance agent oversight, high-risk corridors and informal value transfer
- Charity and NGO donor, partner, beneficiary and humanitarian-delivery controls
- FinCEN inquiries, SAR governance, information sharing and investigation response
Representative experience
Representative experience includes urgent response to government process; privileged reviews of transactions, communications and control decisions; preparation of witnesses and decision-makers; and development of clear submissions for prosecutors, regulators, sanctions authorities, boards and counterparties. Client confidentiality is maintained throughout every engagement, and prior experience does not guarantee a future result.
A matter may begin when a client receives parallel questions from a financial institution and government authority. Jonathan would organize the request set, preserve the evidence, identify the governing legal standards and develop a sequenced response. Where technical analytics, foreign law or specialized accounting is required, he defines the question and integrates qualified experts or local counsel into the legal work plan.
A related assignment may begin when an institution discovers a control weakness while reviewing a terrorism-related alert. The immediate work is to understand the transaction and prevent avoidable harm; the longer work is to determine scope, root cause, reporting implications and sustainable remediation. Legal defense and compliance improvement are coordinated so the record is accurate and the organization can demonstrate what changed.
Education and professional background
Education: NYU School of Law, J.D.; Stanford University computer science studies. Prior public service: FinCEN Senior Adviser for countering the financing of terrorism. Professional focus: Digital-asset analytics, fintech and MSB controls, and CTF programs for charities and NGOs.
For an engagement inquiry, use the firm’s central confidential intake page. Individual contact numbers are not published. Do not send classified information, suspicious activity reports, privileged files or sensitive identity documents before the firm confirms an engagement and provides transfer instructions.
