on hand
US /ɑːn hænd/
UK /ɑːn hænd/

1.
available; in one's possession
:
•
Do you have enough cash on hand for the trip?
•
We need to make sure we have all the necessary supplies on hand.
2.
present at a particular event or situation
:
•
The doctor was on hand to assist with the emergency.
•
Security personnel were on hand to manage the crowd.