If the bow isn't already maxed out and you're just wanting to add a few pounds to your draw weight, all you need is a hex wrench to tighten the limb bolts. If the bow is already maxed out and you're wanting to go heavier, that would be a more involved procedure (swapping mods or limbs and possibly cams).
Any semi-competent bow tech should be able to set your bow to the manufacturer's recommended specs on draw weight, axle-to-axle length, brace height, cam timing, d-loop location, and rest postion/timing. This gives you a good starting point, but a truly tuned bow needs to be tuned to the individual shooter. It's possible that someone else could get your bow close enough to where it needs to be that you could then do the fine tuning on your own solely via rest adjustments, but it would be better if you could be there in person with the bow tech during tuning. If you post your location, someone here might know of a good bow shop nearby.