Some positive aspects of working at Hexacon Construction Pte Ltd include opportunities to learn and become competent in the field, passion for civil engineering work, and bonuses. However, there are several potential challenges mentioned, such as a high employee turnover rate, perceived incompetence among some employees, limited career growth particularly in the M&E department, poor work-life balance with long hours and inability to take sick leave, and a rigid work environment where following instructions exactly is expected and questions or suggestions are discouraged.