Peter Austin, managing director for London Overground Rail Operations Limited (LOROL), said:
"We are disappointed by the result of the ballot, but would highlight that fewer than half of our 124 conductors voted, and only 43% of those voted in favour of industrial action.
"We believe industrial action is unnecessary. LOROL continues to give the RMT assurances on employing conductors in alternative customer service roles and offering a generous voluntary redundancy package to those who want it.
"We urge the RMT to work with us to maintain progress in safeguarding jobs and avoid disruption to passengers."
More top news
On a visit to the Olympic Park, Brazilian footballing legend Pele took the time to talk about the Olympics and England's Euro 2016 demise.
Singer Rita Ora has been hospitalised after reportedly suffering from exhaustion just hours after the man who burgled her home was jailed.
The Hollywood star took residents in Merton by surprise when he touched down in a helicopter near Poplar Road.