McNichols worked at his father's grocery story and for the United States Postal Service.

McNichols established the Retail Merchants Association and operated his father's store.

He was elected to the Pennsylvania State Senate for the 22nd district in November 1910, succeeding Edward Francis Blewitt.

[1] McNichols served until 1914, and was defeated for re-election by William M.

[2] McNichols later served as acting Commissioner of the Pennsylvania Department of Labor and Industry.