Miller was vice president of intellectual property at a public pharmaceutical company, Arrowhead Pharmaceuticals, from 2004 to 2010. He co-authored a book called The Handbook of Nanotechnology: Business, Policy, and Intellectual Property Law. After spending time working in Asia, Miller founded Pasadena-based technology company CaliGroup. CaliGroup's new technology is trialled at the CaliBurger chain of restaurants, offering solutions for "food production, delivery, take out and drive thru". They have invested in gaming to make the restaurant experience more entertaining. Robotics, created by the subsidiary Miso Robotics, are used in the kitchen to fry burgers. Through the Cali Group subsidiary PopID, facial recognition software allows customers to place orders and pay. Miller believes the "restaurant industry has come under attack from increasing costs" and aims to use robotics to "drive down costs associated with labor, especially turnover." He remarked: "Millenials that we hire don't tend to stay very long. They come in, we train them, they work for a while, then go drive an Uber and go home and pay competitive video games". In a Fox News interview in 2017, Miller said the robotic technology increased the quality, consistency and hygiene standards of food as "robots don't spit in food or contaminate food." He said employees' strengths were related to "social interaction" with customers. In response to the coronavirus pandemic in 2020, Miller said body thermometer devices would check for feverish temperatures as customers entered CaliBurger's Pasadena store. CaliBurger was sued by In-N-Out Burger in 2012 for selling “Animal Style” fries and serving milkshakes in palm-tree-print cups; the lawsuit was settled and CaliBurger agreed to change their menu and decor. In 2020, Miller was included on Nation's Restaurant News' Power List.
Personal life
Miller married violinist Caroline Campbell in April 2005. He filed for divorce in June 2011, but they reconciled the following February. They filed divorce papers again in October 2014. In October 2016, they agreed to joint legal custody of their daughter Violet and son Quest. The divorce was finalized in November 2018. In 2018, Miller began dating actress Jennifer Garner.
