“他身兼数职，是多个国家重点项目的负责人”如何用英语翻译

他身兼数职，是多个国家重点项目的负责人＝
He is wearing many hats for very important and responsible jobs for the country (nation)
He is wearing many hats for taking charge of important projects for the country (nation)

He has many part-time jobs, and takes charge of lots of important projects in the country.

He works for many positions, and he is in charge of many important projects in the country.