DFP Expert Needed to Help with Ad Inventory

I need a Doubleclick for Publishers (DFP) and Ad serving expert to successfully move my ad inventory (currently hard-coded into the page HTML) to DFP. Currently, I am seeing processes stack up and page speeds slowing likely because of the hard-coding. I currently use three to four 3rd party ad codes in a daisy chain, likely also producing an overall loss in impressions from one network to another. I would like to consult with expert on how to best maintain/improve the current chain, or, other ways to maximize ad impressions and how to pull and insert advertisers efficiently without breaking the setup. Winning bidder will become a temporary user on my account and will receive all necessary codes to develop efficient system using DFP to serve our ads.