to hold concurrent posts

to hold a concurrent post

to handle two or more responsibilities at the same time; to balance (career and family, or work and studies etc)

compatible

and also; not only, but also; as well

to combine

have both

holding two jobs simultaneously

also; and; moreover

also

jump a queue

and also; plus; moreover;

to annex

to moonlight

to teach classes in addition to other duties

an all-rounder

even more

to contain two things at a time

"universal love", principle advocated by Mozi 墨子[Mo4 zi3], stressing that people should care for everyone equally

a second job

to combine

to have both (at the same time)

to travel at double speed

using several (methods)