Rockstar has announced that changes to the GTA Online job vote screen are imminent. It will include jobs from contacts, so you'll be able to vote to go on jobs issues by Simeon, Gerald, etc., as well as the usual races and deathmatches.
The announcement was made on the Rockstar Support Community.
"Due to high demand from the community, we are adding jobs from contacts to the voting screen. This change will be coming soon, but there is not an exact ETA at this time," it says.
"This feature is being added directly based on feedback from you, our community."
Thanks, Legendary Boss.