Complex sentence: He was subsequently assigned as the Vice President of Stillfoods Inc. Being engaged in the opening of 28 restaurants, he was assigned as the Executive Chef of "Il Pinolo" in Higashi-Azabu in Tokyo.
Split into simpler sentences: He was subsequently assigned as the Vice President of Stillfoods Inc. and helped with the opening of 28 restaurants. Resulting in his assignment as the Executive Chef of "Il Pinolo" in Higashi-Azabu in Tokyo.