I have been going through an old copy of OCP’s Guitar Accompaniment Book (c2005) for ages catching up on all the songs that I haven’t covered from other sources.
This is by Grayson Warren Brown and is based on Psalm 149. It is a joyous light setting that is fiddly as anything but I think would reward getting the assembly doing at least the refrain. It would make a fine entrance hymn. My guitar version has it in D and suggests capo 2 in C – I prefer to play in D over C on an a guitar any day so I don’t understand that at all.
The text is in the preview from OCP and they sell the sheet music for download as well.