Power of Attorney for Grant Thoele, CFO & Treasurer of Aspen Aerogels Inc

The filing is a Power of Attorney document for Grant Thoele, the Chief Financial Officer and Treasurer of Aspen Aerogels Inc. The document appoints Glenn Deegan, Chief Administrative Officer, General Counsel and Corporate Secretary, and Andrew Lauzon, Senior Director, Total Reward, as attorneys-in-fact for Thoele. The attorneys-in-fact are authorized to execute forms and authentication documents for EDGAR Filing Access, complete and execute Forms 3, 4, and 5 in accordance with Section 16(a) of the Securities Exchange Act of 1934, and perform any other necessary actions related to these filings. The Power of Attorney remains in effect until Thoele is no longer required to file Forms 3, 4, and 5, unless revoked earlier.