From 1992 to 1998, he was a senior research engineer at SRI International initially with the Acoustics and Radar Technology Lab (ARTL) and later with the Speech Technology and Research (STAR) Lab. Funded by the US government's NSA and DARPA, Heck led the SRI team that was the first to successfully create large-scale deep neural network (DNN) deep learning technology in the field of speech processing and the first to deploy a major industrial application of deep learning.[2] The deep learning technology was used to win the 1998 National Institute of Standards and Technology Speaker Recognition evaluation.[3]
From 2005 to 2008, he was vice president of search & advertising sciences at Yahoo!, responsible for the company's search and advertising quality. In 2008, Heck worked with Yahoo! Research to combine the two organizations to form Yahoo! Labs.
Beginning in 2009, he was the chief scientist of speech products at Microsoft. In this role, he established the vision, mission and long-range plan and hired the initial team to create Microsoft’s digital-personal-assistant Cortana.[4] Heck was named a Microsoft Distinguished Engineer in 2012 and joined Microsoft Research that same year.
In 2014, he joined Google as a principal research scientist, where he founded the deep learning-based conversational AI team "Deep Dialogue". The team works on advanced research for the Google Assistant.
In 2017, Heck joined Samsung as SVP and co-head of global AI Research. In 2019, he became head of Bixby (virtual assistant) North America and the CEO of Viv Labs, an independent subsidiary of Samsung.