What is TEC? TEC Retreat TEC (Together Encounter Christ) is an intergenerational movement focused on the Paschal Mystery of Jesus Christ. TEC is a high energy and spirit filled retreat where young adults explore and deepen their faith. Weekends are filled with witness talks, group discussions, personal reflections/prayer, recreations and live music. The TEC retreat is for young adults ages 17 (or a 2nd semester junior) and up