The defender, who spent last season at Swindon Town, has agreed a one-year deal at the Matchroom Stadium following a successful trial.
Born in Kingston upon Thames, Sendles-White signed his first professional contract with Queens Park Rangers in January 2012, having first joined the R’s as a 15-year-old.
The defender spent a period on loan at Colchester United at the start of the 2013-14 season, though failed to make an appearance at the Weston Homes Community Stadium.
Sendles-White then made his professional debut a year later on loan at Mansfield Town, playing in a 1-1 draw away to Portsmouth on October 11, 2014. Whilst with at the Stags, the defender made a total of eight appearances.
After departing Queens Park Rangers at the end of the 2014-15 season, Sendles-White then made the switch to Scotland in order to sign for Hamilton Academical.
The defender made a total of seven appearances during six months at New Douglas Park before agreeing to terminate his contract in January 2016.
A month later saw the Northern Ireland youth international sign for Swindon Town, with Sendles-White putting pen-to-paper on a deal until the end of the season.
Having impressed during the latter half of the 2015-16 campaign, the defender then agreed a new one-year deal with the Robins, though missed the majority of last season after suffering a knee injury in September 2016.
The 23-year-old has spent the past few weeks on trial in E10, appearing in several pre-season friendlies.