Janet Tyler, co-CEO and co-founder of Detroit-area tech firm Airfoil, has resigned after a 14-year career.

Tyler, Valee-Smith
Tyler, Vallee-Smith

"I've resigned from Airfoil to explore other career opportunities but I still have that Monday morning, take the world by storm mentality," she wrote on Twitter Nov. 3.

Lisa Vallee-Smith, who co-founded the agency with Tyler in 2000 after their days at Franco PR, takes the reins as CEO, president and owner. She said Tyler stepped down effective Oct. 26.

"After more than 14 years of starting up and running a successful agency, she has made the personal decision to move on and explore new opportunities," Vallee-Smith said of Tyler. "She leaves the firm with much to be proud of: starting up our Silicon Valley operation; leading and growing our business over many years; and establishing our global partner network. We wish her all the best in the next phase of her brilliant career."

Tyler co-founded Airfoil with Franco PR colleague Lisa Vallee-Smith in 2000 and oversaw the opening of its Silicon Valley outpost in 2008. They became co-CEOs in 2012 with Tyler focused on global partner development and digital.

Airfoil, which had $8.6M in revenue in 2013, opened a New York office in June. It has worked for FordDirect, Thomson Reuters, Microsoft, ebay and LinkedIn, among others.

Vallee-Smith added that Airfoil will continue to serve its clients and staff with the "same bright thinking and strategy as we have come to be known for over nearly 15 years."