John Jaggers, the chairman of the Perot board, sent a letter yesterday to board members and donors that said Colleen Walker — “in consultation with the Executive Committee” — has decided to resign as CEO of the Perot Museum of Nature and Science. Her tenure there was less than two years. Walker was hired from her position as head of the Girl Scouts of Northeast Texas (she’d also had a college background in science), and she replaced founding CEO Nicole Small, who’d retired after 13 years.

The letter goes on to describe the Executive Committee and Walker developing “different views concerning the museum’s strategic direction and focus.” Walker will stay at the Perot through June 30th in order to help with the transition to a new chief executive.

Jaggers declined to answer questions but released this statement:

“During her tenure, Colleen energetically and thoughtfully built an operational foundation that will support us for many years into the future.  We are deeply appreciative of her contributions.  Looking ahead, the Perot’s dedicated and talented staff – as well as our passionate volunteers – will continue their superb work inspiring young minds through nature and science.”

And Walker released this statement:

“I am very proud of what we have accomplished and the impact we have had in North Texas during these last two years, and I look forward to working collaboratively with both the Board and my wonderful staff over the next several months to keep critical projects moving forward and to ensure a smooth and seamless transition to new leadership.  It has been richly rewarding to have been a part of an organization that so perfectly aligns with my lifelong passion of advocating for STEM education.”

In June 5, 2015, Walker appeared on the KERA program, ‘CEO,’ interviewed by Lee Cullum: