It may be considered unethical to work part time (weekdays, ~20h/week) at night while working full time for an employer because:a.you are competing with your employer for clients b.you will not be able to perform well in your full time job if you go to work tired most of the time.c.there is a temptation to use your company’s proprietary information
d.getting two paychecks is unfair to other engineers who hold only one job.