On August 7, 2018, Northern Power Systems Corp. announced that Ciel R. Caldwell, the company's President and Chief Operating Officer and current interim Chief Financial Officer, announced her intention to resign as President and Chief Operating Officer of the company, effective immediately, but indicated she would remain with the company to focus exclusively on carrying out her role and responsibilities as Chief Financial Officer of the company. In connection with Ms. Caldwell's resignation as the company's President and Chief Operating Officer, Ms. Caldwell, on August 7, 2018, provided the Company with notice of her resignation from the Board of Directors effective immediately.

Ms. Caldwell has served on the Board since 2016. Ms. Caldwell assumed the position of Interim Chief Financial Officer, effective July 27, 2018, and on August 7, 2018, the Board of Directors of the company appointed Ciel R. Caldwell as the company's Chief Financial Officer, effective immediately. Ms. Caldwell previously has served as the Company's Chief Financial Officer from February 2013 until May 2016.

From May 2016 to August 2016, Ms. Caldwell served as the Company's Senior Vice President for Operations and Finance. On August 7, 2018, the Board of Directors of the company appointed William St. Lawrence and Reinout G. Oussoren as Interim Co-Chief Executive Officers of the company.

Mr. St. Lawrence joined the Company in March of 2017 as its General Counsel and assumed the additional responsibilities of Vice President of Business Development six months thereafter. From 2012 to 2017, he served as the General Counsel and Chief Administrative Officer of Northeast Wireless Networks, LLC, a private equity backed company that designs, builds and operates cellular networks in rural US markets.

Mr. Oussoren joined the Company in September 2009 and has served in a variety of roles with the Company and most recently as the Company's Vice President of Global Sales. Mr. Oussoren brings more than 20 years of commercial and operational leadership experience to the Company from a variety of international organizations.