Company: SNSE
Filing Date: 2025-03-28
Form Type: S-8
Source: 0000950170-25-046346
Chunk: 2

Company: Sensei Biotherapeutics, Inc.
Filing Date: 2025-03-28
Form: S-8
Chunk 2
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, in the City of Boston, Commonwealth of Massachusetts, on this 28th day of March, 2025.

| Date: | March 28, 2025 | Sensei Biotherapeutics, Inc. 
 By:                          | /s/ John Celebi                       |
|:------|:---------------|:-----------------------------|:--------------------------------------|
|       |                |                              | John Celebi                           |
|       |                |                              | President and Chief Executive Officer |

<div align='center'>POWER OF ATTORNEY</div>

KNOWALLPERSONSBYTHESEPRESENTS, that each person whose signature appears below constitutes and appoints John Celebi and Josiah Craver, each of them, as his true and lawful attorneys-in-fact and agents, each with the full power of substitution, for him and in their name, place or stead, in any and all capacities, to sign any and all amendments (including post-effective amendments) to this Registration Statement on Form S-8, and to file the same, with all exhibits thereto and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done in connection therewith, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them, or his or their substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, this Report has been signed below by the following persons on behalf of the Registrant in the capacities and on the dates indicated.

| Name                   
 /s/ John Celebi        |     | Title                                                                         
 President, Chief Executive Officer and Director (Principal Executive Officer) |     | Date           
 March 28, 2025 |
|:-----------------------|:----|:------------------------------------------------------------------------------|:----|:---------------|
| John Celebi            |     |                                                                               |     |                |
| /s/ Josiah Craver      |     | Senior Vice President of Finance (Principal Financial and Accounting Officer) |     | March 28, 2025 |
| Josiah Craver          |     |                                                                               |     |                |
| /s/ William Ringo      |     | Chair                                                                         |     | March