Please help me makes his piece of writing free of errors. Thanks

Mr. Hosseini knows how to govern himself and how to adapt to others. When working in a team, he get's along well with other team members. This has enabled him to work with many researchers and to gain experience doing research in various areas. In recent years, since he is no longer a student, he focuses his time and energy on investigating a diverse range of mathematical subjects, and co-authored several different papers. Now, he has the ability to study and do research independently with a high degree of creativity. Putting high energy into work when you are not forced to do so is an indication of a high level of motivation.