MONMOUTH – Elisabeth Thibodeau and Michael St. Pierre, along with their families, are happy to announce their engagement. Liz is the daughter of Dawn and Pete Thibodeau of Monmouth. Mike is the son of Ruth and Jeff St. Pierre of Bangor. Liz is a graduate of Monmouth Academy and earned her master’s degree in structural engineering from the University of Maine in Orono. Mike is a graduate of Bangor High School and earned his master’s degree in geotechnical engineering from the University of Maine in Orono. Liz and Mike are employed at engineering firms in Portland, Ore. A September 2009 wedding in Hallowell is being planned.