Sylven Joshua Landesberg (born April 10, 1990) is an American-Israeli-Austrian professional basketball player for Hapoel Haifa in the Israeli Premier League.

In his sophomore year at Holy Cross High School in Flushing, New York, he averaged 20.9 points, 8.1 rebounds, and 1.7 assists a game during 2005–06.

[1] In 2006–07, during his junior year, he averaged 25.7 points, 10.5 rebounds, and 3.6 assists a game, and was again named All-City honors by the Daily News and the Post.

[1] In Landesberg's sophomore season he led the Cavaliers in scoring again, averaging 17.3 points a game (sixth in the ACC), along with 4.9 rebounds and 2.9 assists.

[3] On March 6, 2010, Landesberg was suspended for the remaining game of the season for failing to meet academic obligations.

[13] On October 5, in a pre-season game against the Cleveland Cavaliers, he led his team in scoring with 23 points, also having 5 rebounds, 3 assists and steals.

On November 20, he scored a season-high 22 points and added 9 rebounds in a EuroLeague game against Limoges CSP.

[19] On 1 April 2018, Landesberg recorded a career-high 48 points, shooting 8-of-11 from three-point range, in a 100–95 win over FC Barcelona.

Landesberg helped Türk Telekom reach the 2019 BSL Playoffs, where they eventually were eliminated by Fenerbahçe in the Quarterfinals.

[26] On November 9, 2018, Landesberg was named a member of the Austria national basketball team for the EuroBasket 2021 qualification.

He also added ten rebounds, five assists and two steals, leading the Austrian team to a 96–82 win over Great Britain.

[29] Landesberg is Jewish,[30] and was born in Brooklyn to an Austrian-Jewish father, Steven, and a Trinidadian and Tobagonian mother, Ingrid.