Sergeant Kups died in Camp Bastion, Helmand Province, Southern Afghanistan on Friday, 21st September 2012.
His family said: "Jonathan was a wonderful husband and loving father to three children. He was a loyal man with a wide circle of friends, a devoted son, son-in-law, grandson and brother."
His three children described him as the best Dad, who was their hero and would always be in their hearts. His wife said: "I love you now, forever and always and evermore."
Sergeant Kups was from Nuneaton, Warwickshire. He was born on 28 October 1973 and joined the Royal Electrical and Mechanical Engineers in June 1992 where he trained as an electronics technician.
In 2011 Sergeant Kups moved to 104 Force Support Battalion REME, based at Tidworth before being attached to 4 Close Support Battalion REME for its deployment on Operation HERRICK 16.
The MOD said he was a man of considerable military experience and well-respected by his section and by the unit as a whole.
An investigation into the death is currently underway.