The last Secretary of the Department of Energy had a PhD in nuclear physics and was chairman of the physics department at MIT. The Secretary before him had a Nobel Prize.
Trump's nominee for the job is Rick Perry. A college cheerleader who majored in animal husbandry, got a "D" in "Meats" class and an "F" in organic chemistry. [mic.com] Later, during a presidential debate, Perry was unable to recall the name of the Department of Energy despite it being on his list of departments he wanted to shut down. He later explained his reasoning: “They've never created one bit of energy, the best I can tell.”
But this isn't just a case of hiring the fox to guard the henhouse. Trump hired a fox who doesn't even know what hens are. Today, the New York Times reports [nytimes.com] that Rick Perry did not know that the DoE's primary mission was to manage the country's nuclear arsenal.