There is no fixed time period for finding a job after completing a Master's degree in the US. Students who have completed their MS degree in the US are usually given a grace period of 12 months, which is known as Optional Practical Training (OPT), to find a job related to their field of study and work in the US. During the OPT period, international students are eligible to work in the US on a temporary basis without a work visa, allowing them to gain practical experience in their field of study. However, it's important to note that the OPT period is only available once per academic level, and it must be completed within 14 months after graduation. It's recommended that students start looking for a job well before their OPT period ends to maximise their chances of finding employment in the US. Students can also work with their university's career services office and attend job fairs to explore potential job opportunities.