Heidi Welsh, executive director of the Sustainable Investments Institute (Si2), has analyzed corporate responsibility since 1987. Si2 is supported mainly by subscriptions from large institutional investors. Starting at the Investor Responsibility Research Center, Welsh covered shareholder advocacy and for 16 years also monitored corporate compliance with a Northern Ireland fair employment code. She co-authored CDP’s 2007 S&P 500 report, worked at RiskMetrics (now MSCI), and consulted on GRI guidelines. Welsh is the lead author of several corporate political influence studies and an expert on the SEC’s shareholder proposal rules.