A race for two seats on the Board of Selectmen is among five contests that will be on the ballot of the April 6 annual town election. In the six-way selectmen’s race, incumbent Todd Johnson is vying with Mary Ellen Fernald, Robert T. Marcin, Richard E. Menard, Kenneth A. Miano, and James Wentworth. Fernald served on the Board of Health before she was unseated last year. Marcin and Miano lost bids for Board of Selectmen last year. Wentworth is a former member of the Economic Development Committee. Incumbent Anne Marie Stronach is not seeking reelection. Three candidates are competing for two School Committee seats, one of which is open because Joseph E. Russell is not seeking reelection. Incumbent Kristen M. Polimeno is competing against Raymond A. Lisiecki and Lisa J. Puccia. There are two Board of Health races. Three candidates are contending for two regular three-year seats: incumbents Phillip French and Christine Kinnon, and James M. Killion. Raymond Barry and Joseph F. Knight are contending to fill the remaining two years of a vacant seat. Patricia Meuse, a member of the Shawsheen Regional Technical School Committee, faces a challenge from Richard O’Neill Jr. Four other candidates are running unopposed.