Jaeckle attributed his success as Republican Party leader in New York to integrity, tight fiscal control and tight control of his office holders. He also was a successful lawyer in private practice. His law firm, Jaeckle, Fleischmann & Mugel, which was perhaps the most stellar name in the Western New York legal firmament for decades, announced on September 30, 2015 that, as of January 1, 2016, it would cease to exist. The remnants of the partnership were joined into a Syracuse, N.Y.-based firm and, in a move that stunned observers of the legal profession, the iconic Jaeckle Fleischmann name was not retained.