Sorry, no you can not prune these guys without ending up with sticks and dying trees. No hedging can be made of these trees; Junipers? Cedars? I am assuming these trees provide privacy?
What I would do is to prune the limbs that touch the ground. Not too much just a foot off the ground and up the trunk. Cut out dead limbs. Do not cut the ends of branches only cut whole branches all the way back to the trunk. Leave no 'stumps'. Do not treat cuts with anything. Use a pruning saw or by pass pruner. Small diameter branches from the trunk should be cut off as they are small because they are not doing enough work to support the tree thus the tree doesn't support the too small branch and its photosynthetic leaves. Cut right off at the trunk. Leave no nubs. Cut dead branches out.
Pruning is a way to hurry up what the tree will do anyway; getting rid of the material that doesn't add to the health of the plant or tree. Getting rid of dead material that only blocks ventilation and sun. Getting rid of branches that rub that could cause infection, getting rid of branches that are never going to be able to be enough of a producer to add more energy than it needs to receive to remain. We pruners just help a tree be a healthier version of itself. Live longer.
Use by pass pruners not anvil; there is a Felco 2 that will easily cut 1" branches. Always clean your pruners before and after each tree with alcohol. Anything that you use to prune, clean with alcohol. Keep sharpened. Felco you can replace the cutting blade as well. Don't find that anymore...they will last forever.