The graduates join the ranks of a select group that works directly with customers and transportation managers to provide safe, reliable service. The new assistant conductors were formally inducted earlier this month during a ceremony at MBCR's training facility in Somerville, Mass.

Assistant conductors play an essential role in commuter rail operations by staffing entrances and exits to ensure customer safety, working with customers to ensure their well-being and checking trains for any onboard issues. They also collect revenue, tickets and check passes.

All assistant conductors are required to complete an extensive training program, including classroom and field experience with safety, federal rules and regulations, revenue collection and customer interaction.

The March graduates also were trained during the most recent buy-before-you-board initiative to spot potential fare evasion and identify fraudulent passes using blacklight technology.

MBCR is a partnership of Veolia Transportation, Bombardier Transportation and Alternate Concepts. It operates and maintains the fifth largest commuter rail network in the U.S. under a contract with the Massachusetts Bay Transportation Authority.