Kyle Mills has signed up to play for Middlesex in this season's Friends Life T20 competition.
The New Zealand fast bowler will join up with his new team-mates after Thursday's international t20 against England and will be available for every Middlesex game.
Angus Fraser, director of cricket at Lord's, said: "There are several reasons why Kyle is a good and exciting signing for Middlesex.
"During the recent Champions Trophy he highlighted what a high quality white ball bowler he is by topping the tournament averages and having one of the best economy rates.
"Kyle will bring experience and quality to our attack, with his presence also allowing the club to manage the workload of a bowling attack that is competing in all three domestic tournaments.
"This season we play two Championship matches in the middle of our t20 campaign and, ideally, we want to keep our fast bowers as fresh as we can. At the moment we have two or three bowlers who are either injured or recovering from injury.
"Corey Collymore is not contracted to play t20 cricket and we will also lose Tim Murtagh to Ireland for a week in early July. The squad is looking forward to welcoming Kyle on board."
Mills said: "I am really looking forward to contributing to what I hope will be a successful campaign for Middlesex. It's exciting to be involved in a club rich in history and tradition."