I think all work that doesn't cause harm and most things are both spiritual and mundane. One of the scriptures I aspire to live by talks about working for a living:
And to make it your ambition to lead a quiet life: You should mind your own business and work with your hands, just as we told you, 12 so that your daily life may win the respect of outsiders and so that you will not be dependent on anybody.
1 Thessalonians 4:11-12 (New International Version)
Of course, I haven't worked regularly for money for most of my adult life, but I've done a lot of less than glorious unpaid work while my husband has done the working for a living thing for all of us. Taking care of other people is spiritual to me, even when it's cleaning a poopy diaper and doesn't feel spiritual at all.