OK this is a gathering song. It is by Jaime Cortez and is a pop song with mild enough syncopation to get by and enough interest in the tune to sustain the task. The text is worthy and serviceable but will need an injection of enthusiasm by the assembly.
The text is at spiritandsong and the sheet music can be purchased for download at OCP. You can hear the original here. It sounds like he is channelling Michael Mangan.
My backing goes more latin pop.
The man himself:
The Pax Christi Choir: