Plan:b lead by Felipe Mesa and Federico Mesa. Plan:b is an architectural office that defines the work through a practice in which equal attention is paid to dialogue, drawing, travel, layout, models, construction, professional + academic situations, publications, and more. Plan:b works collaboratively; the office believe in teamwork either local or worldwide. Since 2000 to 2005, architects Felipe Mesa and Alejandro Bernal led the office; Felipe Mesa was head of the office from 2006 until 2010.

Currently Felipe Mesa and Federico Mesa are principal partners. The work of plan:b is generated primarily through participation in international architectural competitions, and also collaborating internationally with other professionals in a variety of projects.