Aeisha Mastagni is a portfolio manager in the Sustainable Investment and Stewardship Strategies unit of the California State Teachers' Retirement System, the largest educator-only pension fund in the world, and the second largest pension fund in the U.S. Aeisha is responsible for working with a dedicated team to further CalSTRS' mission to secure the financial future and sustain the trust of California's educators. Aeisha's main areas of focus are the portfolio engagement program, executive compensation, selecting and monitoring managers in the activist manager portfolio, and working with regulatory authorities on market wide issues. In 2012, Aeisha joined the board of directors at Golden 1 Credit Union, one of the nation's largest credit unions with more than $11 billion in assets and one million members. In 2021, Aeisha was elected to a second term on the board of directors for the Council of Institutional Investors, whose mission is to be the voice of effective corporate governance practices and shareholder rights. Before joining CalSTRS, Aeisha worked in the corporate governance unit of the California Public Employees' Retirement System for six years overseeing the proxy voting program and the corporate governance manager portfolio. Prior to CalPERS, she worked in operations at Salomon Smith Barney before moving to Morgan Stanley as a financial advisor and assistant operations manager. Aeisha has a BS in economics from California State University, Sacramento.