The defender from Red Bull Salzburg is going to be a member of the United States team.
The right-back will join the club on July 1st.
He scored 10 goals as Salzburg won a league and cup double.
International clearance and a work permit are required for the transfer to take place.
"When I heard about the option to come here, I was really into it," he said It wasn't hard to convince me that it was a good idea.
I can't wait for the season to start and I'm happy that everything is settled.
Jesse Marsch, who previously managed him at the Austrian club, has since signed him from the Dutch club of the same name.
He will become the second player to join the club from Salzburg this summer, after American bicyle Brenden Aaronson decided to join the club last month.
After a rough time, he brought me to Salzburg from Amsterdam and I needed a rebuild. Jesse made me a better football player.
I decided to join here because of him. I like his style of football.
He began his career in his home country with FC Midtjylland, who became the Danes' champion.
He won a league and cup double in his one full season at Ajax before joining Red Bull Salzburg, where he has won three back-to-back domestic doubles under Marsch's management.
After surgery on his long-standing knee injury, right-back Luke Ayling will be out of action for the rest of the season, but will be replaced by 20-year-oldCody Drameh.
On our dedicated page, you can find all the latest football transfers.