John J. Jones has become assistant plant manager of Lehigh Portland Cement Co., replacing Charles Moore, who is now production superintendent at Lehigh's white cement plant in Waco, Texas.

Jones, a 22-year industry veteran, has worked for Lehigh since 1984. He comes to this plant from Lehigh's Cementon, N.Y., facility.

A native of Emmaus, Pa., Jones resides in Westminster with his wife, Carolyn, and two daughters, Natalie and Emily.