'Monster Works for Me' aims to show users how the online recruitment firm can help them.
Banner ads featured on sites like MSN aim to drive traffic to Monster.co.uk and Monster.ie.
The ads highlight Monster's new series of career advice podcasts and aim to encourage visitors to upload their CV to the Monster database, which it says holds 10 per cent of the UK working population's CVs.
Monster is running a competition asking people to write in and explain how the company helped them to get a job. It is giving away weekly prizes and the winners will be entered into a final draw to win a laptop.
Lisa Hutt, marketing director at Monster UK and Ireland, said: "Online advertising is central to Monster's marketing because of the web's significance to our business and its success in past campaigns. We will spend a large part of our marketing budget online in 2007."
The global campaign, created by Brand Content, was localised by Leo Burnett for England, Scotland and Ireland. Media and online was handled by MEC.