Martha Inés Romero Medina is a Colombian peace practitioner, with a MA in Development Project Management, studies in Peace and Conflict Transformation at Kroc Institute, Notre Dame University in the United States; and a Diploma in International Development Cooperation, Peace Institute, Oviedo University, Spain. Since 2023, Martha Inés has served as Secretary General for Pax Christi International, a Catholic global peace movement. In 2007 she joined PCI as a Board member; for 14 years she coordinated the Latin America and Caribbean Pax Christi Program on "Strengthening Communities’ Capacities to Resist to Extractivism -Mining, Agrobusinesses, others-, with Peacebuilding, Advocacy and Active Nonviolent Citizen Actions". Martha Inés has promoted the Catholic Nonviolence Initiative, a PCI program.

Before Pax Christi and for 20 years, Martha Inés managed development, humanitarian, peace and reconciliation programs for Oxfam-Great Britain and Catholic Relief Services (CRS).  Since 2010, she advised Caritas Internationalis in Rome, Caritas Latin America and the Caribbean and Caritas Asia in the design of Advocacy Plans with a faith focus; as Consultant, Martha Inés also evaluated programs in Latin America for organizations based in Norway, Sweden, Canada, and the United States.