Exhibit 17.1
May 11, 2015
Dear BOD Colleagues,
I write to inform you of my resignation from the ZIOP BOD with immediate effect.
I also express my enormous respect, affection, and gratitude to each and every one of you. I thank you for the privilege and honor of being able to serve as CEO and Board Member of ZIOP.
With every best wish.
Respectfully yours,
Jon