Joshua P. Marston, Portfolio Manager, is an Investment Officer, Director of Fixed Income, and Director of Structured & Financial Research at MFS Investment Management® (MFS®). Josh's responsibilities include managing MFS' fixed income portfolio management team as well as oversight of MFS' structured product strategy, dedicated structured product portfolios, and portfolio management responsibilities for several of the firm's other fixed income strategies. Mr. Marston has been employed in the investment area of MFS since 1999 as a credit analyst.

Alexander M. Mackey, CFA, is an investment officer and fixed income portfolio manager with MFS Investment Management(r) (MFS(r)). He has portfolio management responsibilities on the firm's limited duration and multi-sector fixed income strategies. He also has research analyst responsibilities. Alexander joined MFS in 1998 as a financial control assistant and was promoted to section manager in 2000. He joined the Fixed Income Department as a research associate in 2001 was promoted to fixed income research analyst in 2004. He took on portfolio management responsibilities in 2017. Alexander has a bachelor's degree from Trinity College and holds the Chartered Financial Analyst (CFA) designation. He is a member of the CFA Society of Boston.