Mr Sass was named as executive chairman of the board and chief technology officer. The new executive appointments are effective immediately, the company said.

Mr Sass said: “Larry Letteney’s accomplishments as a business leader in rapid growth technology environments make him ideally suited to lead Second Wind. The market for remote sensing in the wind industry is growing exponentially, and we’ve established both technological and market leadership globally. Larry’s vision for the potential of our technology and his breadth of experience will help shape Second Wind as we continue to grow and innovate.”

Mr Letteney said: “Walter Sass was one of the first entrepreneurs in the wind industry to recognize the need for advanced wind information technologies. Under Walter’s creative and able leadership, Second Wind has made a critical contribution to the way the wind industry uses information, and ultimately to making wind energy feasible. I am delighted to be working with such an excellent team, in service to clean energy and with such enormous business potential.”

Prior to working at Second Wind, Mr Letteney held senior posts in software, hardware and web services for start-up, mid-stage and public technology companies.