EXHIBIT 99.1
Joint Filer Information
Each of the following joint filers has designated Crestview Partners II GP, L.P. as the “Designated Filer” for purposes of the attached Form 4:
| 1. | Crestview Partners II SES Investment B, LLC c/o Crestview Partners 590 Madison Avenue, 42nd Floor New York, NY 10022 |
| 2. | Crestview Partners II SES Investment, LLC c/o Crestview Partners 590 Madison Avenue, 42nd Floor New York, NY 10022 |
| 3. | Crestview Advisors, L.L.C. c/o Crestview Partners 590 Madison Avenue, 42nd Floor New York, NY 10022 |
| 4. | Robert V. Delaney, Jr. c/o Crestview Advisors, L.L.C. 590 Madison Avenue, 42nd Floor New York, NY 10022 |
Date of Event Requiring Statement: May 7, 2021
Issuer Name and Ticker or Trading Symbol: Select Energy Services, Inc. [WTTR]
CRESTVIEW PARTNERS II SES INVESTMENT B, LLC
| By: | /s/ Ross A. Oliver |
| Name: Ross A. Oliver | |
| Title: General Counsel |
CRESTVIEW PARTNERS II SES INVESTMENT, LLC
| By: | /s/ Ross A. Oliver |
| Name: Ross A. Oliver | |
| Title: General Counsel |
CRESTVIEW ADVISORS, L.L.C.
| By: | /s/ Ross A. Oliver |
| Name: Ross A. Oliver | |
| Title: General Counsel |
ROBERT V. DELANEY, JR.
| By: | /s/ Ross A. Oliver, Attorney-in-Fact |
Date: June 4, 2021
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