Marcum LLP provides a full spectrum of traditional tax, accounting and assurance services; advisory, valuation and litigation support; and an extensive range of specialty and niche industry practices. The Firm serves both privately held and publicly traded companies, as well as high net worth individuals, private equity and hedge funds, with a focus on middle-market companies and closely held family businesses.

Marcum offers an extensive range of professional services and a high degree of specialization. In addition to domestic and international tax planning and preparation, the Firm's professional services include mergers and acquisition planning, family office services, forensic accounting, business valuation and litigation support.