From the epistle of today's Mass for St. Alphonsus di Liguori:
…Conduct yourself in work as a good soldier of Christ Jesus. No one serving as God’s soldier entangles himself in worldly affairs, that he may please him whose approval he has secured. … The farmer who toils must be the first to partake of the fruits.
The bold part is related to:
…they that use this world, as though they used it not…
We certainly must use the world; that's what God created it for. But He doesn't want us to be entangled in it.
Hence, it seems that working with seculars would be to bear the yoke with them if you are working
for them and against God. But if you are using them (not working for their godless ends but using them for bringing about God's will), then this would not be to bear the yoke with them.
Catholics must
use their godless employers, not be servilely obedient to them.