Pre heat oven to 350 degrees. Line baking sheets with parchment paper.
Place butter and sugars in a large bowl. With hand mixer combine sugar and butter until creamy. Add eggs and vanilla extract and incorporate. Set aside.
With a whisk or fork combine flour, salt, baking soda and powder in a medium bowl. Add the flour mixture (in two batches) and incorporate the wet ingredients with the dry. Stir in the rolled oats and the chips and nuts.
Spoon tablespoons of the dough onto the parchment lined cookie sheets. Gingerly sprinkle sea salt on top of the dough. Bake 9 minutes or until cookies become lightly browned. The cookies will continue to cook after you remove them from the oven. Cool on wire rack.