BOSTON–(BUSINESS WIRE)–Loomis, Sayles & Company announced today that Colleen Denzler, CFA, has been named the firm’s head of ESG (environmental, social and governance). Colleen, who is based in Boston, will report to David Waldman, chief investment officer. As head of ESG, Colleen – who brings significant ESG, investment and leadership experience to Loomis Sayles – will advance the firm’s already well-established ESG initiatives, support sustainability efforts as part of Loomis Sayles’ ow