David Mejía holds a degree in Philosophy from the Universidad Autónoma de Madrid and in Literary Theory from the Universidad Complutense. He studied his Master's degree at Columbia University thanks to an Excellence Scholarship from the Rafael del Pino Foundation, and upon completion he received an offer from the university itself to complete his doctorate there. Until his arrival at CUNEF, he was a professor of Philosophy and Humanities at IE University, where he has taught undergraduate and graduate courses such as Introduction to Philosophy (PPLE), Critical Thinking or Legal Thought, and co-directed two TFGs.

He is a regular contributor to the press (El Mundo) and radio (Ondacero).