Bassil Chelala is married to Mario Chelala,[18] a prominent Lebanese entrepreneur who owns SIMCO Engineering and Trading, a Lebanese electro-mechanical company specialized in the concept, design, and implementation of large-scale projects.[19] He is also the co-founder of Byblos Advanced Energy,[20] which specializes in building, maintaining, and operating dual basis low-sulfur heavy fuel oil and liquefied natural gas electricity plants in Lebanon.[21] Joumana Bassil Chelala and Mario Chelala have two children.[5]