Lintzenich is the president of his own consulting company. He has worked on air traffic control projects for the Federal Aviation Administration, and airport expansion issues for airline, controller and pilot associations. He is a pilot expert witness for the U.S. Department of Justice. He has spent the majority of his business life in the field of aviation, serving as the First V.P. of Air Transportation and Chief Pilot for a Fortune 500 corporation for more than 23 years. He teaches a course at a local junior college on classical music appreciation.