RSM US LLP

01. Company

RSM US LLP is a leading professional services firm specializing in audit, tax, and consulting services for the middle market. It operates as the U.S. member firm of RSM International, a global network headquartered in London. Founded in 1926 as IB McGladrey Company, the firm maintains over 80 offices across the United States and Canada. With a workforce exceeding 10,000 employees, RSM focuses on delivering personalized assurance, tax, and advisory solutions to mid-market businesses, emphasizing a client-centric approach and collaborative leadership structure to support growing organizational needs.

02. Product

RSM provides comprehensive professional services including audit, tax, and consulting engagements tailored for mid-market enterprises. The firm also develops and licenses proprietary technology platforms such as PartnerSight for practice management and FamilySight for family office data management. RSM has expanded its technology ecosystem through strategic partnerships, notably integrating with Arch for document and data management in private equity and venture capital, and previously partnering with Canoe Intelligence to enhance client service delivery and operational efficiency across its advisory practices.

03.Security & Risk

RSM aligns its information security standards with the ISO/IEC 27001:2022 framework, supplementing it with industry best practices and regulatory requirements. The firm mandates security reviews for third-party vendors handling confidential data and incorporates confidentiality, privacy, and breach response clauses into vendor agreements. Despite these controls, RSM disclosed a data security incident in March 2025, resulting in notifications to the Massachusetts Attorney General and affected individuals, highlighting a recent compromise of personal information that warrants heightened scrutiny and ongoing monitoring.

04. Events

• [other] Transatlantic Partnership with RSM UK

  RSM US LLP and RSM UK Holding Limited announced a transatlantic partnership effective January 1, 2026, to expand cross-border service capabilities.

  Jan 1, 2026, 12:00 AM · Source

• [leadership] Executive Appointments

  Jamie Burgess named board chair in May 2025, alongside six executive leadership appointments.

  May 12, 2025, 12:00 AM · Source

• [leadership] Executive and Board Appointments

  RSM US named Jamie Burgess as board chair and made multiple executive and practice leadership appointments in May 2025.

  May 12, 2025, 12:00 AM · Source

• [leadership] Board Chair and Executive Appointments

  Jamie Burgess named board chair in May 2025, with six executive leadership appointments made.

  May 12, 2025, 12:00 AM · Source

05. Dependencies

Fourth parties this vendor relies on - subprocessors, infrastructure, and integrations surfaced from public sources.

• Arch

  IntegrationSource →

• Canoe Intelligence

  IntegrationSource →

06. Competitors

Vendors offering a similar product or service - for side-by-side comparison, not a ranking.

• PwC

  Global professional services firm

  Vet this vendor →

• EY

  Global professional services firm

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• EisnerAmper

  Professional services firm

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• Moss Adams

  Professional services firm

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• Baker Tilly

  Alternative in audit services

  Vet this vendor →

07. Recent News

Recent developments include RSM US forming a transatlantic partnership with RSM UK effective January 2026, alongside multiple leadership appointments across business lines. The firm published a 2026 Cybersecurity Special Report revealing that 18% of middle-market executives experienced a data breach in the previous year. Additionally, RSM is engaged in litigation against Cision US, Inc., alleging breach of contract and other claims, with Delaware court proceedings ongoing. The firm also continues to expand its technology platforms and strategic alliances to support client growth.

08. Citations

1. [1] Data security incident discovered March 15, 2025, reported to Massachusetts AG. Notice of Data Security Incident Dear : RSM US L
2. [2] Top competitors include PwC, EY, EisnerAmper, and Baker Tilly. RSM - Market Share, Competitor Insights in Accounting And Tax Services
3. [3] Information security standards align with ISO/IEC 27001:2022 framework. Information security protocol | RSM US
4. [4] Founded in 1926 as IB McGladrey Company. RSM US
5. [5] Headquarters located at 30 South Wacker, Chicago, Illinois. RSM US
6. [6] RSM US LLP is a professional services firm specializing in audit, tax, and consulting services. RSM US LLP Data Breach Lawsuit — Free Case Review

12. Vendor response

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