My Japanese student asked me to explain in detail the grammar in the following sentence. "Starting this fall, Sugi Pharmacy Co., headquartered in Obu, Aichi Prefecture, will offer seniors a new type of job contract in order to help its older employees keep fitter for longer as well as address the company’s manpower shortage."
Specifically, he wants to know about the grammar structure from "keep fitter for longer as well as address the company’s manpower shortage".
The student is not familiar with linguistic terms, which is why I hesitated to answer him during the lesson. Can someone please help me provide an easy to understand explanation?