A Rivett man has been remanded in custody after he allegedly assaulted and stalked his ex-partner, attacked her in front of her young child and drove a car through her front door.

The ACT Magistrates Court on Saturday heard Rohan Leigh Coppin, 35, is an employee of the Australian Border Force, currently on leave for unrelated personal reasons.

Coppin allegedly tried to drive the woman off the road as she went to collect her child from day care.

The pair had ended their relationship that same day.

Court documents show that on Thursday the woman was at home with her child when she allegedly saw Coppin at her door, sliding his finger across his throat.

He demanded to be let in before he entered through the garage, approached the woman and ripped off her necklace in front of the child.