"Dennis deserves an Academy Award for this one," said co-worker Brad Rome. "He kept that incredible secret for days, then as calm as calm could be, he surprised us with the news."
Cartier said he didn't find out about the big win until he checked the numbers on Saturday afternoon while on his way to pick up lunch.
He checked his ticket at a gas station and couldn't believe his eyes. He then raced home, signed the ticket and put it on the refrigerator.
"I wanted to stay calm, eat my burrito and check the numbers again online. Every single number matched up, so I went back to where I bought the ticket and that's when it all became very real."
Cartier, who was not supposed to work Monday, arrived at the office in sandals and a T-shirt instead of his usual suit. He called a work meeting and broke the news.