Roy Celaire, 29, of Sir Francis Way, Brentwood, Essex fought the case, but was convicted by a jury.
He was charged that between November 14 and 16, 2014 at a flat in Swan Court, High Road, Whetstone he neglected Michael Cohen, a person who lacked mental capacity.
At Harrow Crown Court Celaire was sentenced to five months imprisonment, suspended for eighteen months and ordered to complete 170 hours community service work.
The jury found him not guilty of causing actual bodily harm to Mr. Cohen at the flat on November 15, 2014.
Celaire may now be subject to inclusion on the barring list, prohibiting him from working with young and vulnerable people and must also pay an £80 victim surcharge.