MGO
U.S. CPA and advisory firm providing enterprise tax, international tax, state and local tax, credits, assurance and consulting services.
- Highest 2026 tier: Tier II
- CPA and business advisory firm
- Corporate Tax Advisory
Overview
MGO was founded in 1987 and serves public and private companies, entrepreneurs, government organizations and high-net-worth clients. It maintains a U.S. platform supported by international delivery capabilities, including MGO India.
The firm’s tax services cover enterprise business tax, closely held companies, international tax, state and local tax, tax controversy and credits and incentives. Transaction, valuation, technical accounting and management-consulting services broaden its support around business change.
MGO is included in one 2026 Advisory Ranking category. The highest recorded classification is Tier II.
Firm facts
| Legal name | Macias Gini & O’Connell LLP |
| Founded | 1987 |
| Firm type | CPA and business advisory firm |
| Principal offices | Los Angeles, San Francisco Bay Area, New York, Sacramento, San Diego, Bengaluru |
| Primary focus | Enterprise, international and growth-company tax advisory |
| Chief Executive Officer and Managing Partner | Kevin O’Connell |
| Highest 2026 Advisory Ranking tier | Tier II |
Principal activities
Corporate tax advisory
Tax planning, structuring, compliance coordination and support for corporate tax departments.
International and transaction tax
Cross-border planning, transaction support, transfer pricing and ownership-structure analysis.
Tax operations and incentives
Tax accounting, provision support, credits, incentives, indirect tax and technology-enabled processes.
MGO works with clients on assignments that may combine strategy, specialist analysis, implementation support and organizational adoption. The precise scope depends on the mandate, sector, geography and client requirements.
Sector and mandate coverage
Sector coverage
- Corporate and private businesses
- Technology
- Manufacturing
- Financial services
- Real estate
- Consumer markets
Tax and mandate types
- Corporate tax planning
- International tax
- Transaction tax
- Tax accounting and provision
- State and local tax
- Credits and incentives
Market position
MGO is positioned as a cpa and business advisory firm. Its relevance reflects the depth of its tax specialization, corporate-client orientation, technical delivery model and ability to support complex or recurring tax requirements.
Distinctive focus: Growth-company and middle-market tax services connected with assurance, transactions and sector-specific consulting.
Competitive context
MGO competes with tax-led professional-services firms, independent accounting networks, specialist consultancies and tax-technology platforms. The relevant peer set varies by jurisdiction, client size, tax type and whether the mandate requires strategic advice, compliance execution, specialist documentation or software.
Comparable firms are selected according to overlap in business model, client segment, service coverage, geographic activity and mandate profile. Inclusion does not imply equivalence in scale, ranking or market position.
Leadership
| Person | Current position | Institutional background |
|---|---|---|
| Kevin O’Connell | Chief Executive Officer and Managing Partner | Firm strategy, assurance and advisory leadership |
Leadership information reflects the public sources reviewed for this profile. View the firm’s website ↗
Corporate and regulatory information
Macias Gini & O’Connell LLP is a certified public accounting firm. Professional responsibilities, licensing and permitted services vary by engagement and jurisdiction.
View registered-entity details
| Principal entity | Macias Gini & O’Connell LLP |
| Professional status | Certified public accounting firm |
| Headquarters | Los Angeles |
| Primary jurisdiction | United States |
Principal offices
- Los Angeles
- San Francisco Bay Area
- New York
- Sacramento
- San Diego
- Bengaluru
Rankings and recognition
Ranking inclusion is editorially determined. The existence or maintenance of a Wiki profile does not influence ranking eligibility, tier or position.
Related Economy analysis
Selected Economy Markets articles providing context for the firm’s advisory environment:
- Middle-Market Private Equity: Returns, Scale and Manager Selection
- Private Equity Technology Due Diligence in the AI Era
- The Silent Reshuffle of the Advisory Market
Related institutions and subjects
Sources and data transparency
The profile is based on the following publicly available institutional, regulatory and editorial sources:
- Tax Services — corporate tax, specialty tax or tax-technology capabilities.
- MGO — firm overview, services and institutional information.
- Advisory Ranking — Top 30 Corporate Tax Advisory 2026 — inclusion and tier classification.
