SAN ANTONIO--(BUSINESS WIRE)--FirstSouthwest has announced that investment banker Ricardo Villaseñor has joined the company’s public finance office in San Antonio as Senior Vice President, Underwriting/Financial Advisor. Mr. Villaseñor brings more than 15 years of public finance experience to his new role with FirstSouthwest. He has worked with issuers throughout Texas on more than $3.0 billion of financial advisor/senior managed revenue, general obligation, unlimited tax, variable rate and tax