[3] He joined the Brotherhood of Locomotive Firemen and Enginemen (BLFE), and held several posts in this union.
[4] In 1986, at the Brotherhood of Locomotive Engineer convention, Dubroski was elected to the position of vice president, assigned to the railroads on the east coast of the United States; Amtrak; Conrail; Septa; Metro North; Long Island Rail Road; the New York, Susquehanna and Western Railway; and Delaware and Hudson Railway.
In August 1999, Dubroski took over from Monin, who left office after losing a recall vote by a narrow margin.
In September three officers of the BLE obtained a court injunction to stop the count of the ratification ballot.
A few days later, the UTU launched an attempt to be recognized as representing workers of the Kansas City Southern Railway, replacing the BLE.
Dubroski effectively campaigned and won the right to remove and eliminate polychlorinated biphenyl from locomotive engines, roundhouses, and the soil that surrounds train yards.
[8] In 2019, Dubroski won the New Jersey Jefferson Award for a second time in consecutive years for Leadership and Innovation due.