Grumpy Old Geeks People Chris Hadnagy Person Chris Hadnagy 2 mentions in 1 episode An author and podcaster whom the speakers recommend for his work on social engineering. Mentions 460: Pedestrians in the Sky Aug 1, 2020 48:33 He's literally written, you know, the books on social engineering. 49:31 Last time I saw Chris Hadnag, he was at Derby Con.