Sendles-White has played for Queens Park Rangers since the age of fifteen and signed his first professional contract with the club on 1 January 2012, keeping him until 2013. In May 2013, Sendles-White signed a contract with the club on a one-year extension. In June 2014, Sendles-White then signed a one-year contract extension with the club. Sendles-White was released by the club at the end of the 2014–15 season.
On 20 September 2013, Sendles-White joined Colchester United on a one-month loan, but he failed to make an appearance.
He then went on to join Mansfield Town on loan again in October 2014, and had his loan extended the following month. Sendles-White made his Football League debut on 11 October 2014 at Fratton Park in a 1–1 away draw against Portsmouth in League Two. Sendles-White went on to make seven appearance before being recalled by his parent club on 8 December 2014.
After leaving Queens Park Rangers, Sendles-White went on trial at Swindon Town.
He signed for Scottish Premiership club Hamilton Academical in August 2015. On 7 November 2015, Sendles-White made his Hamilton debut in a 2–0 away defeat against Heart of Midlothian, replacing Jesús García Tena in the 37th minute. A couple of weeks later, Sendles-White made his first start for Hamilton in their 1–1 draw with Aberdeen, featuring for the entire 90 minutes.
On 29 January 2016, Sendles-White's contract at the club was terminated.
On 16 February 2016, Sendles-White signed for Swindon Town, agreeing a contract until the end of the 2015–16 season. Four days later, Sendles-White made his Swindon debut in their 3–2 victory against Blackpool, featuring for the entire 90 minutes. On 11 May 2016, Sendles-White signed a new one-year deal at the club after impressing within his first few months. On 17 September 2016, Sendles-White was ruled out for the remainder of the 2016–17 campaign after he ruptured the anterior cruciate ligament in his left knee following a collision with Tom Pope in Swindon's 2–1 defeat against Bury.
On 2 May 2017, Sendles-White announced that he would leave Swindon upon the expiry of his contract in June 2017.. Sendles-White has been strongly linked with a move to Blackpool Football Club.
On 1 August 2017, Sendles-White signed for Leyton Orient on a one year deal.
Having made three appearance for Northern Ireland U19, Sendles-White was called up by Northern Ireland U21 on 17 May 2013. Sendles-White made his Northern Ireland U21 debut on 30 May 2013, in a 3-0 loss against Cyprus U21.As of match played 22 September 2017.