William Thielen was named COO for the $14 billion Kentucky Retirement Systems, Frankfort, confirmed Marlane Robinson, human resources director. He reports to Executive Director William Hanes. Mr. Thielen replaced Gordon "Don" Mullis, who resigned in April. Mr. Thielen had been policy development specialist for the Kentucky League of Cities.
Thomas Toy was named manager-benefit plan investments, accounting and analytics for Chevron Corp., San Ramon, Calif., succeeding Bill Clutter, who was named accounting manger for Chevron International Exploration and Production. Mr. Toy had been manager of Chevron's forecast and reporting group. The company had $26.7 billion in retirement plan assets as of Sept. 30.