[1] His opened an office in Phoenix, Arizona, as a labor-management arbitrator, and then was employed by the Matson Navigation Company in San Francisco as its vice president for industrial relations from 1960 to 1967.
[1] Averting a nationwide strike that would have started at midnight on August 7, 1977, Horvitz assisted in negotiations between the Communications Workers of America and the American Telephone & Telegraph.
[3] As part of the Carter Administration's efforts to avert a strike, Horvitz helped the United Mine Workers replace several senior positions of officials who had been fired by union president Arnold Miller, an action described by The New York Times as a "highly unusual move" that was intended to ensure that negotiations could only proceed successfully if the union had the organization it needed.
[1] Horvitz played an active role in negotiating a new master freight agreement between the trucking industry and the Teamsters, ending a 10-day strike and lockout that had 300,000 drivers and other union employees out of work.
Horvitz served as mediator from the start of negotiations and praised both sides for resisting internal and external pressures to prolong the work stoppage.