McNulty is a band and orchestra director and clinician, speaker, band judge, local historian, publisher, educator, author, and musician.

His career also includes 20 years teaching music fulltime and over 30 years in business including extensive experience in China helping American companies sell to the Chinese.

Today he owns a publishing company which publishes his books and digital products along with those of other authors including books for organizations. He is currently an adjunct faculty member at Prairie State College in Chicago Heights, Illinois