Find extension for joomla 2.5

hello ,I need someone I can make the following this is site i'm build : [login to view URL] when you click to "About us " you will see "Profile,people,client " and when you click to "expertise" you will see 3 submenu .we call it is "Project" example : we have project name is "Project A" and people name is "Worker A" and a client name is "Client A" Client A has projectA and workerA working on this project (ProjectA) now, what i need is +On project will display all project i created and when click to each project, i can see description of the project and worker working on it +On People will display all people and when i click to each people, i can see description of this people and what project he working +On Client will display all client and when i click to each Client, i can see description of this client and all project he got please go here to better understand what I described, this is the first version of this site : [login to view URL] you can see it on submenu... Thanks Happy biding