Eldad Paiss was born in Rishon Le Zion. He learned in the primary school ("Haviv") in the settlement and in the vocational school "Montifiorie" in Tel Aviv. He was a practical Engineer in his profession and graduate of the "Technion's" engineering maintenance course which was held in Tel Aviv.
He was in his youth a member of the "Maccabi Hatzair", an instructor and secretary of the latter movement's branch in the settlement. He was sportsman - active in branches such as handball, hockey, soccer and gymnastics; was a member of core settlement group, training in Rananna. Later on in 1949, he settled in "Kibbutz Hasolelim".
Eldad was recruited to the "Haganah" when being a very young boy. He attended a communication course and a squad commanders' course and belonged to a reconnaissance platoon of the Field Force (Chish"). He took part in the settlement of the 11 spots in the Negev at the conclusion of Yom Kippur 1947, when his reconnaissance platoon is carrying the supply, serving at the same time as the defense force until the termination of the field organization. He was a platoon commander in "Givat Hashlosha" up to the declaration of the establishment of the state of Israel. Later, he fought in Kibbutz "Yad Mordechai" as a Negev Brigade Personnel member.
He instructed in a squad commanders course and - in a scouter's course. After his release he returned to "Kibbutz Hasolelim" engaged in agriculture work and served at the same time as a district commander ("Maaz"). After the birth of his eldest son he left with his family and returned to Rishon Le Zion.
While working in workshops, he simultaneously studied in an engineers maintenance course. For thirty years until his retirement, he worked as a maintenance manager in food plant.
Within the framework of his voluntary activities he managed the hand ball team of "Maccabi" Rishon Le Zion. The club has won in his era the Israeli championship.
He volunteered with the staff who organized the "Maccabi Hatzair's" training convention which was held in honor of country's anniversary.