Millennial with a job? You're not likely to be there long, according to one new poll.

Only 50 percent of people born between 1980 and 1996 said they plan to be with their company in a year, while 50 percent also said that they would take a different job for a raise of 20 percent or less, according to new information from Gallup's report, "How Millennials Want to Work and Live," published Tuesday.

Millennials make up 38 percent of the workforce and are estimated to make up about 75 percent of it in less than 10 years, according to the poll.

The problem? Engagement. Gallup found that young employees who are engaged are 64 percent less likely to switch jobs even if the job market improves.

Gallup suggests that managers do what they can – from creating worthwhile opportunities to becoming more approachable – to retain millennial employees.

Companies and cities across the country have launched similar efforts, including Philadelphia.

The Mayor's Office of Public Engagement recruited more millennials for an advisory board in September. The purpose of the board is to come up with ways to attract and maintain young workers.

“A lot of millennials are here for school or for short-term commitments, but we would love to see them here long term,” Nina Ahmad, deputy mayor of public engagement, told PhillyVoice in August.

Philadelphia was also ranked as the 17th-most desired city in a survey of 2,000 young people born between 1982 and 1998, according to Abodo, a real estate company.