Initially, Thatgamecompany consisted of Chen, Santiago, Nick Clark, who had collaborated with Chen on Flow, and John Edwards. Santiago was the president of the company and the producer for its games, Clark was the designer, and Edwards was the lead engineer. Although Chen cofounded the company, he initially worked at Maxis on the game Spore. The company considered adapting Cloud as their first product for Sony, but instead decided on Flow, as it was "more fleshed-out as a design". They felt that it would be easier than Cloud to develop while they built the company; no members of the team had experience with managing a business or with creating a commercial game. Several contract workers assisted Thatgamecompany with Flow's development, including Austin Wintory, the game's composer.The company had believed that the PlayStation 3 version of Flow could be completed in four months, and that it would be ready for the November 2006 launch of the PlayStation Network. However, when it was released in February 2007, it did not include "half of the original design". According to Santiago, the Sony producer assigned to the team had anticipated that they would underestimate the game's development length, and was not surprised by the delay. The game was well received; it became the most downloaded game on the PlayStation Network in 2007, and was nominated for the Best Downloadable Game of the Year award at the 2008 Academy of Interactive Arts & Sciences Interactive Achievement Awards, and for the Best Innovation award at the 2007 British Academy of Film and Television Arts (BAFTA) awards. After its release, an expansion pack and a PlayStation Portable version of the game were created by SuperVillain Studios. Thatgamecompany was not involved in the development of either project beyond ensuring that they retained the same design and art direction as the original, as they were busy creating their next title, Flower.Flower was Thatgamecompany's "first game outside the safety net of academia", according to Santiago. Six to nine people were involved at different stages of development. Chen returned to work full-time at the company prior to the game's development, and served as the creative director. The game's music was composed by Vincent Diamante, who had worked with Chen and Santiago on Cloud. The game was developed for two years, but the team spent three-fourths of that time in the prototyping stage. After they decided on the game's elements, Flower was produced in only six months. Like Flow, the game was well received when it was released in February 2009, selling in the top ten PlayStation Network titles of the year and garnering several awards. After the release of Flower, Thatgamecompany moved into their own building in Los Angeles.The company's latest project is Journey, which was released on March 13, 2012. It was the final game in Thatgamecompany's three-game contract with Sony, and was developed by a team of fourteen. This team did not include Santiago, who, in order to concentrate on her role as the company's president, was replaced as a producer by Robin Hunicke. The game was in development for three years, despite having been expected to take one year, and the development team faced several problems in expanding the company from seven employees as they began the game to eighteen, and risked running out of money. Upon release, the game achieved both critical and commercial success. It became the fastest-selling game to date on PlayStation Store in North America and Europe. After the game was released, as the company began work on another project, several employees left for other opportunities. Santiago left the company to pursue other ventures, designer Chris Bell left to form his own studio The Willderness, and Hunicke resigned to work at Tiny Speck. Chen attributes the exodus to the end of Thatgamecompany's three-game contract, and to the fact that the company had run out of money to pay employees, mandating an unpaid hiatus unti

Question: What role did John Edwards have at the company?
Answer: lead engineer