Complex sentence: This colleague appears to be lost without his job and Lionel realizes that time is moving on and he (Lionel) must find meaning and security in other things outside of his present life lest he end up the same way.
Split into simpler sentences: This colleague appears to be lost without his job, and Lionel realizes that time is moving on. He (Lionel) must find meaning and security in things other than his present life, lest he end up the same way.