estaban concertando
Imperfect progressive ellos/ellas/ustedes conjugation of concertar.

concertar

El Departamento también informó a la Junta de que, como la ONUB no contaba con ese tipo de aeronaves de alta velocidad, se estaban concertando arreglos para compartirlas cuando fuera necesario.
The Department also informed the Board that, as ONUB had no such high-speed aircraft, arrangements were being made to share MONUC assets when necessary.
Word of the Day
to skate