1. General Business Sub-Industries

In broad economic terms, the professional services sector is broken down by the specific expertise offered to clients. The primary sub-industries include:

• Accounting and Tax Services: CPA firms, bookkeeping, payroll services, and tax preparation.

• Legal Services: Law firms, corporate counsel, dispute resolution, and legal consulting.

• Management Consulting: Strategy, operations, financial advisory, and organizational change consulting.

• Architecture and Engineering (A&E): Architectural design, civil engineering, structural engineering, and urban planning.

• IT and Technology Consulting: Software implementation, cybersecurity advisory, system integration, and IT strategy.

• Marketing, Advertising, and PR: Branding agencies, public relations firms, digital marketing, and market research.

• Human Resources and Staffing: Executive search, recruitment agencies, HR consulting, and benefits administration.

• Design Services: Graphic design, industrial design, and interior design firms.

2. GICS (Global Industry Classification Standard)

Under the specific Professional Services (202020) industry bracket, GICS recognizes two official sub-industries:

• Human Resource & Employment Services (20202010): Companies providing business support services relating to human capital management (e.g., employment agencies, temporary staffing, executive search).

• Research & Consulting Services (20202020): Companies primarily providing research and consulting services to businesses and governments (e.g., management consulting firms, market research, and testing services).