Founded in 1987, Macias Gini & O'Connell, also known as MGO, is a public accounting and consulting firm. It maintains locations in San Diego, Los Angeles, Sacramento, Oakland, Walnut Creek, Century City and Newport Beach in California. The firm works with a team of more than 230 staff members. Macias Gini & O'Connell offers assurance, tax, advisory and business management services. Macias Gini & O'Connell serves clients in the educational, government, health care, manufacturing, real estate and technology industries. It is one of the leading, privately held companies in the United States that provides financial management and internal audit services. The company s clients include Bustos Media and Solar Power.