Who did this?

I'm pretty sure this is a woodpecker's handiwork. I'm thinking it's probably from the Pileated Woodpecker. What do you think? I'll be going on a "stake out" with my new camera lens in hopes of capturing whichever bird did this.

P.S. I got a Sigma 150-500mm F5-6.3 lens. I'm so excited! Does anyone else have this lens and any tips for me?