Huddersfield have brought forward the appointment of Kieron Purtill as assistant to new head coach Paul Anderson.
Purtill, who lost his assistant's job at St Helens when Royce Simmons was sacked in March, was due to join the Giants at the end of the season.
But the departure of Nathan Brown last week prompted the club to fast-track the promotion of Anderson and they have moved to bring on board Purtill ahead of Sunday's game against St Helens, when Huddersfield will be looking to end a four-match losing run.
Purtill, who is currently coach of England Knights, said: "It's good to get in early and get my feet under the table. I've missed the day-to-day coaching and the involvement of rugby league."
Huddersfield managing director Richard Thewlis said: "I welcome Kieron and a fresh face and ideas will help in so many areas at a time when clearly we are hurting on and off the field."