Ken Bossen has joined MainStay Investments, a New York Life Company based in New York City, in the Institutional Intermediary Business as director of ETF business development, MainStay announced Tuesday.

Bossen will focus on investment strategies and research analysis. An ETF industry veteran, he previously served in senior positions with State Street Global Advisors, Morgan Stanley and Citigroup.

In his new position, Bossen will be responsible for providing coverage and thought leadership to ETF analysts, portfolio construction teams, investment strategists and the RIA ETF investment strategist marketplace.