Good tag architecture will save you a lot of trafficking issues, giving you better performance, ease of campaign management and eliminating delivery problems.
I’ve implemented tags with Doubleclick Small Business, Doubleclick Premium, OpenAdStream, OpenX. For custom tracking I have experience with Google Tag Manager, Adform and Turn.
If you already are using an adserver, I can handle the migration procedure. I’ve managed multiple migrations without encountering any problems.
If you are in the process of acquiring an adserver, I can offer an evaluation of each considered adserver, with requirements, advantages and disadvantages, and costs.