Quick answer — Naohiro Washio worked on Mobile Suit GUNDAM Iron Blooded Orphans 2 (Mechanical Design), Mobile Suit GUNDAM Iron Blooded Orphans (Mechanical Design), Fafner Exodus (Mechanical Design) and 8 more anime.
Naohiro Washio worked on Mobile Suit GUNDAM Iron Blooded Orphans 2 (Mechanical Design), Mobile Suit GUNDAM Iron Blooded Orphans (Mechanical Design), Fafner Exodus (Mechanical Design), Heaven's Lost Property the Movie: The Angeloid of Clockwork (Design Works), Endo and Kobayashi Live! The Latest on Tsundere Villainess Lieselotte (Prop Design), Fafner (Mechanical Design), Valvrave the Liberator 2 (Mechanical Design), Valvrave the Liberator (Mechanical Design) and 3 more.