Brian Trelstad Partner. The Alliance works to increase awareness of impact investing in the United States, foster deployment of impact capital across asset classes globally, and partner with stakeholders, including government, to build the impact investing ecosystem. You must be logged in to register for an event. Explore how investors are deploying their capital for a better world—and how you can join them. Mark has been a consultant to foundations, nonprofits, and philanthropy associations for the last dozen years. Mission Investors Exchange.