The 24-year-old has trained with Gavin Cowan's squad throughout pre-season and featured in all four friendlies so far, scoring three times from central midfield.
Former Manchester City academy youngster McHale has spent a number of years in non-league football, turning out for the likes of Northwich Victoria, Salford City, Hyde United before he joined Ashton United – either side of professional Football League deals with Barnsley and Oldham.
McHale, a powerful midfielder, has caught the eye in his trial games with the Bucks, netting too fiercely struck left-footed goals in the win at Market Drayton Town and another neat strike in the 2-2 draw at Stafford Rangers.
Cowan, whose side face Notts County behind closed doors tomorrow, has seen enough of Manchester-born McHale to believe he can make a 'heavy contribution' for Telford this season.
The boss said: “He worked exceptionally hard over the last few months with us and impressed to the point where we feel he will have a heavy contribution on what we do."
McHale added: “I'm really grateful to the manager for giving me the opportunity, from here it’s only onwards and upwards.
"I can’t wait to get started and am delighted to sign for such a big club as AFC Telford.”