Exhibit 99.4
CONSENT TO REFERENCE IN PROXY STATEMENT/
CONSENT SOLICITATION STATEMENT/PROSPECTUS
September 5, 2021
Pioneer Merger Corp.
660 Madison Avenue, 19th Floor
New York, NY 10065
Pioneer Merger Corp. (the “Company”) is filing a Registration Statement on Form S-4 with the Securities and Exchange Commission under the Securities Act of 1933, as amended (the “Securities Act”). In connection therewith, I hereby consent, pursuant to Rule 438 of the Securities Act, to the reference to me in the proxy statement/consent solicitation statement/prospectus included in such Registration Statement as a future member of the board of directors of the Company, such appointment to commence immediately after the effective time of the merger described in the proxy statement/consent solicitation statement/prospectus.
| Sincerely, | |
| | |
| /s/ John Flynn | |
| Name: John Flynn |