De or het coaching?

The correct Dutch article is:

de coaching

Rule Words ending in -ing: almost always de. See the rule
Meaning (Dutch) het coachen

How to use coaching

the coachingde coaching
this coachingdeze coaching
that coachingdie coaching
our coachingonze coaching
your coachingjouw coaching
every coachingelke coaching
which coaching?welke coaching?
a big coaching / the big coachingeen grote coaching, de grote coaching

Dutch words ending in coaching

bandcoaching | relatiecoaching | teamcoaching | stemcoaching | loopbaancoaching

In compound words, the last part decides the article. See the rule

Dutch words starting with coaching

coachinggesprek | coachingsboek | coachingsessie | coachingsgesprek | coachingstraject | coachingsvaardigheid | coachingtraject | coachingsproces

Meaning, plural, diminutive, pronunciation and translations: WikiWoordenboek (Dutch Wiktionary) (CC BY-SA 4.0). Example sentences: Tatoeba (CC BY 2.0 FR).