Vote onto
Definition 1 of 1
Pro Tip 1/3Democratic Process
Indicates a decision made by majority in a group, often in a formal setting like organizations. 
She was voted onto the board after receiving the most votes from shareholders.
Pro Tip 2/3Inclusion Outcome
The phrase implies that the person was previously not a member of the group they're being voted into. 
After the annual meeting, two new members were voted onto the committee.
Pro Tip 3/3Power Transfer
Using 'vote onto' suggests the transfer of power or responsibility to the elected person. 
As the new captain, he was voted onto the leadership team by his teammates.