Master of Heists

Description
"Velsa let me in on one of the perks of being a member of the Thieves Guild: Heists. She's sending me to the guild's heist master to get vetted for work. "

Or, if the Vestige obatins the quest from Velsa's note instead of from Velsa herself:

"Velsa left me a note to discuss one of the perks of being a member of the Thieves Guild: Heists."

Reward

 * 302 gold
 * 5 Thieves Guild reputation