Colleen O'Brien

Head of Marketing and Communications
Based in Seattle
Specializing in

About me

Colleen leads brand marketing and communications strategy at M12.
She oversees the fund’s digital channels and creative development, and plays an advisory role to M12’s portfolio companies.
Prior to joining M12, Colleen held several marketing and communications roles across Microsoft, most recently as the executive communications manager for the head of Microsoft Azure, as his team grew from 4,000 to 14,000 employees. Before making the shift to enterprise technology, Colleen led Microsoft employees to donate a record $142 million to nonprofit organizations as the communications manager for Microsoft’s annual employee giving campaign. She also held product marketing roles in Windows and Office, driving consumer acquisition and engagement globally.
Colleen has an MBA from the University of Washington Foster School of Business and a Bachelor of Arts from Harvard College. She is a certified executive coach and sits on the advisory board of Women in Cloud, a global organization influencing gender policy and practice to better support women-founded enterprise software businesses.