John Boland said: “The current political ideology of prematurely ending the oil and gas industry without any thought to the impact it has on workers is unforgivable.”
Harrington joins from Burness Paull, where she spent seven years as a director in the employment team.
Amanda McCullloch said: “This EOT is our way of recognising and rewarding the people who have been instrumental in making TMM Recruitment what it is today."
The digital assistant is intended to cut down the number of routine questions staff receive, letting teams deal with urgent and complex tasks.
Unite Scotland has secured a union recognition agreement covering workers based at the Advocacy Service Aberdeen (ASA).