Bond Fund

Fund manager head shot

Ruta Ziverte

Head of fixed income for William Blair Investment Management, and portfolio manager for the Core Fixed Income and Intermediate Fixed Income strategies. In this role, Ruta is responsible for developing and executing our fixed-income growth strategy (in conjunction with other members of the team), team leadership, and select portfolio management. Before joining William Blair, Ruta worked at Oppenheimer Funds, where she was the portfolio manager for the Global High Yield Fund and co-portfolio manager for the Global Strategic Income Fund. She also led a team of fixed-income credit analysts. Before joining Oppenheimer Funds in 2015, Ruta worked at GE Asset Management, where she most recently served as executive managing director and high-yield portfolio manager. Previously at GE, Ruta was a team leader and senior analyst, co-managing a leveraged finance research team, and was responsible for developing and implementing the firm's credit processes and procedures. Earlier in her career, Ruta was a credit analyst with Citigroup/Travelers Life and Annuity. She also worked at Phoenix Investment Partners.


Education: B.S. in business administration from the University of Latvia; M.B.A. from Rensselaer Polytechnic Institute

Tenure with William Blair: Since 2019

Fund manager head shot

Paul J Sularz

Portfolio manager for William Blair's Core Fixed Income, Intermediate Fixed Income, and Low Duration Fixed Income strategies. Before joining the firm in 2006, Paul was a vice president at J.P. Morgan Securities from 2004 to 2006, where he was responsible for trading specified pool agency mortgage-backed pass-through securities for the firm›s primary broker-dealer located in New York City. Before that, he was a director in the asset-backed and mortgage-backed securities group at Banc One Capital Markets from 1995 to 2004, where he managed the firm›s mortgage-backed securities trading desk in Chicago. Paul began his career in 1990 as an assistant portfolio manager in the fixed-income institutional asset management division of Kemper Asset Management Company. He is a member of the CFA Institute and CFA Society of Chicago.


Education: B.A. in Economics, University of Illinois at Urbana-Champaign; M.B.A., University of Chicago Booth Graduate School of Business.

Tenure with William Blair: Since 2006