Audit, tax, and consulting for middle-market businesses across 120 countries.
RSM is a network of independent accounting and consulting firms providing assurance, tax and advisory services. Its global website reports 56,000 people across 120 countries and more than 500 offices. These are network-wide figures, not the size of one family-office practice. Engagements are delivered by the relevant member firm, which practices in its own right.
RSM US has a dedicated Family Enterprise Advisory offering for designing, running and transitioning a family office. Its service page describes support across tax, governance, operations, risk, technology and family dynamics, with more than 800 interdisciplinary consultants. That practice figure and the capabilities below relate to the US member's offering; they should not be assumed available in every country.
A cross-border family can also assess the relevant RSM member's tax, consulting, transaction and risk capabilities. Confirm which firm is responsible for each workstream, which professional permissions apply, how local specialists coordinate, and how data and reporting flow between them.
The network is administered by RSM International Limited, registered in England and Wales under number 4040598, with its registered office at 200 Aldersgate Street, London EC1A 4HD. The RSM brand and related intellectual property belong to RSM International Association in Zug, Switzerland. The network itself is not a single global legal entity.
Published global leadership includes E.J. Nedder, Bob Dohrer, William Cheng and Nicola McCoy, with Brian Becker as International Chairman. The US family-office service page identifies Karen Costa as Family Office Enterprise Leader and Ron Nahass as Family Office Consulting Leader. Their practice responsibilities are distinct from global network management.
The family-office proposition is relevant to families assessing an operating-model redesign, succession or governance needs, specialist tax and risk work, technology implementation, or outsourced administration. It can complement an existing single- or multi-family-office team. Select the engagement around the actual member firm's services and required jurisdictions; a network affiliation alone does not establish that every service will be delivered under one contract or through one technology platform.
Start with the relevant member firm or the US family-enterprise team and describe the family entities, locations, existing advisers, reporting requirements and operational priorities. Agree responsibility for implementation and ongoing work, data access, coordination with other advisers, deliverables and escalation contacts. The reviewed pages do not establish standard fees, account minimums, implementation timelines or service-level commitments; request a scoped proposal.
Sources: global overview; network structure; global leadership; US family-office services and practice contacts. Reviewed 1 November 2026.
Strengths. Broad member-firm geographical coverage; Dedicated US family-enterprise service model; Professional and operational support alongside existing advisers.
Watch-outs. Member firms are legally independent.; US practice services are not automatically available in all jurisdictions.; Engagement responsibilities, fees and service levels require agreement..
Built for Single Family Office (SFO), Multi Family Office (MFO), Finance / Accounting Teams, Fund Managers.
Families and family-office teams evaluating professional advice, operating-model changes or outsourced support through the appropriate member firm; local availability must be confirmed.
Contact the responsible member firm or US family-enterprise team; agree ongoing contacts, escalation and cross-firm coordination in the engagement.
Define family entities, jurisdictions, existing advisers and operational priorities; agree scope, responsibility, deliverables and data access.
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