Debug Slow loading Social Engine Site

We have a live Social Engine site running a number of plugins crucial to our site's functionality, it has been live for 16 days and and there has been a significant increase in the time the site is taking to load over the last fortnight than when it launched - we are continually working on it so have added code etc., over the last two weeks and we need assistance in identify and resolving what is causing the site to take so long to load at start up. Please only apply for this job if you are confident you can resolve this issue!