In a domain, the Ometsuke officers were mostly selected from the retainers of the domain who were placed under Churo (the post immediately under Karo), Ban-gashira (a post in the domain government) and Kumi-gashira (also a post in the domain government).
諸藩にあっては、おおむね中老・番頭・組頭より格下の藩士から選ばれた。