A mobile ad-hoc network(MANET) is a collection of wireless mobile nodes. These nodes are self-organized to create a temporally connection between them without any pre-defined network infrastructure. Nodes communicate each other via direct shared wireless radio links. Each mobile node has limited transmission range. Co- operative nodes, willing to communicate with other nodes out of their transmission range, employ a multi-hop strategy. Therefore, each node simultaneously acts as a router and as a host. Nodes can also join and leave the network at any time. These nodes usually have limited battery life. Nodes are capable of saving their battery power by switching off. They can be switched on when they need to communicate again. Due to their dynamic topology, MANETs are very useful. However this dynamic nature can cause nodes to be compromised easily. Therefore, in this setting, trust is considered to be a key concept in securing MANET environment. But the notion of trust is not granted, as it is measured by observation with time. Besides, mobility of nodes between clusters of MANETs, poses a significant challenge to recommender systems. The ‘new-node‘ problem is difficult to tackle, since without previous preferences of a node, it is not possible to find similar ratings to build a recommender-based profile. Therefore this research presents a rationale and design for much richer dynamic trust management than it is possible today.