Mr. Petrinowitsch, a native of Cincinnati, Ohio, joined the staff at Williams High School in 2018 as the Director of Bands. Mr. P directs the Warrior Marching Band, Wind Ensemble, Jazz Band, and Concert Band and assists with the Symphonic Band and the Percussion Studio at Williams High School. Before arriving at Williams, Mr. Petrinowitsch was the Assistant Director of Bands and the Percussion Director at Plano West Senior High School and Lakeview Centennial High School in Garland, TX.

Mr. P earned his Bachelors's in Music Degree from the University of North Texas in Denton, TX with a specialization in Percussion. Mr. P has performed with the UNT Green Brigade and Concert Bands, the 2 O'Clock Steel Drum Band, and the National Champion UNT Indoor Drumline. Mr. P is also a Drum Corps International and Winter Guard International Finalist, having performed with the Colts Drum and Bugle Corps and Metro Alliance Indoor Drumline in 2007. Mr. P is an occasional performer with the Lone Star Wind Orchestra and Lone Star Percussion Ensemble in Richardson, TX, and also is the drummer for a Dallas-based rock band, Abacu5.

Outside of school, Mr. P loves spending time with his beautiful wife and son as well as being out in nature, working out and playing golf.