This paper of lessons learnt depicts results gathered from several GEF SGP funded projects on marine and wetlands ecosystem conservation implemented in localities in Viet Nam. The paper intends to present relevant information about biodiversity conservation activities implemented in several typical ecological regions of Viet Nam, such as the Cu Lao Cham - Hoi An Biosphere Reserve (Quang Nam province) and Van Long Nature Reserve (Ninh Binh province). The paper also presents some lessons learnt from the implementation of respective projects in order to improve the effectiveness of the management and implementation of GEF SGP projects in Viet Nam.