Guilford, Conn.-based American Cruise Lines said it is hiring 52 new employees to fuel its aggressive growth plans.

The open positions are in marketing and sales, including supervisors and trainers, as well as shoreside operations, including directors of hotel and marine operations. Open positions are also in recruitment, training, accounting and finance.

American Cruise Lines now operates six small ships throughout the U.S. and is building four more vessels to enter service between 2015 and 2017.

The company has experienced annual growth of more than 25 percent in each of the past three years.

Follow Theresa Norton Masek on Twitter @cruiseapalooza.