Chilton, who was left without an Formula One seat after Marussia's administration at the end of the 2014 season, will be behind the wheel of the team's no. 8 entry which was shared by Sebastian Saavedra and Sage Karam last season.
The 24 year old competed in selected Indy Lights races last season taking ten top five finishes, six podiums and a win from pole position at Iowa - his first oval win. His début US campaign coincided with a Le Mans 24 hour outing as part of Nissan's ultimately failed LMP1 effort.
"I couldn't be happier to join Chip Ganassi Racing's Verizon IndyCar Series program," said Chilton,"This organization is built on winning and their 11 IndyCar championships back that up. Chip is the kind of team owner that every driver dreams of working for in their career. He's accomplished so much in so many different categories over the years, and I can't wait to start driving for him."
As well as F1, Indy Lights and his sole LMP1 start, Chilton also has extensive experience in GP2 and Formula Three; something that team boss Chip Ganassi believes will be beneficial for the team.
"Max is a talented young driver who has driven a number of different disciplines already in a short time,"said Ganassi. "He brings a good deal of experience to our Indy car lineup and we're looking forward to him being part of our four-car team in 2016 and making a big contribution."
Images: Dominik Wilde, IndyCar Media