David Plecha is Dimensional’s Global Head of Fixed Income. A member of the Investment Committee and Investment Research Committee, he not only manages US and global portfolios but also maintains much of the fixed income research and client communications. Dave received his Chartered Financial Analyst® designation in 1996. Prior to joining Dimensional in 1989, he managed stock index futures and options for Leland O’Brien Rubinstein Associates and was an operations planner for Texas Instruments.

Joseph Kolerich is Head of Fixed Income, Americas, Senior Portfolio Manager and Vice President of Dimensional and a member of the Investment Committee. Mr. Kolerich has an MBA from the University of Chicago Booth School of Business and a BS from Northern Illinois University. Mr. Kolerich joined DFA as a portfolio manager in 2001 and has been responsible for the fixed income portfolios since 2012.

Mr. Cummins is a Vice President and Senior Portfolio Manager of the Advisor. Mr. Cummins holds an MBA from The University of Texas at Austin, and a BS from Trinity University. Mr. Cummins joined the Advisor in 2012, has been a portfolio manager since 2018, and has been responsible for the DFA Selectively Hedged Global Fixed Income Portfolio, DFA Short-Term Extended Quality Portfolio, DFA Intermediate-Term Extended Quality Portfolio and DFA Short-Duration Real Return Portfolio since 2025.