Hemel have signed centre Chris Heil and forward Sonny Esslemont ahead of the new season.
Heil, 25, made four Super League appearances for Hull KR earlier in his career and has since played in League 1 for both Newcastle and Doncaster.
Hemel coach Dean Thomas told the club’s official website: “Chris comes to us motivated and with a point to prove, his Super League and League 1 experience, speed and strength will add to our strike capabilities.”
Also joining the club is Esslemont, 24, who has represented Scotland at international.
A product of the Hull KR academy, he has also played for Newcastle and Keighley.