In a pre-Toronto Film Festival move, Gerard Butler has boarded workplace drama “The Headhunter’s Calling,” with shooting starting Oct. 26 in Toronto.

Voltage Pictures has come aboard to sell international rights and will begin selling at Toronto. CAA is handling the domestic rights.

First-time director Mark Williams will helm from Bill Dubuque’s script, which centers on a ruthless headhunter who arranges jobs for engineers. He is well on his way to achieving his longtime goal of taking over the company, when his 10-year-old son falls ill — leading to a clash of his personal and professional priorities.

Producers are Williams, Butler and Alan Siegel (“Olympus Has Fallen”). Dubuque and Danielle Robinson will serve as executive producers, along with Dan Bekerman of Scythia Films.

Dubuque wrote the scripts for Robert Downey Jr.’s “The Judge” and Ben Affleck’s “The Accountant.” Dubuque is also writing “The Real Deal” with Chris Pratt set to star.

Sale of the international rights was brokered by CAA on behalf of Butler, Williams, Dubuque and the production. Dubuque is managed by Eric Williams at Zero Gravity Management.

Butler recently starred in Focus Features’ “London Has Fallen,” the follow-up to his 2013 thriller “Olympus Has Fallen.” He will next be seen in “Gods of Egypt” for Lionsgate and in “Geostorm” for Warner Bros.