Carmel-based Transworld Business Advisors of Indiana has named Andrea Derrer business advisor. She previously served as a real estate broker for Fishers-based Marten Realty Group. Derrer has more than 20 years of business experience. She has successfully led multi million-dollar businesses, launched start-ups and executed turnarounds within the consumer electronics, automotive and utility industries. Derrer earned a B.S. in mechanical engineering from Tennessee State University and an executive M.B.A. from the University of Chicago’s Booth School of Business.