Sentinel Energy Services Inc. Announces the Separate Trading of Its Class A Ordinary Shares and Warrants, Commencing December 22, 2017

December 21, 2017

HOUSTON–(BUSINESS WIRE)–Sentinel Energy Services Inc. (the “Company”) announced that, commencing
December 22, 2017, holders of the units sold in the Company’s initial
public offering may elect to separately trade the Class A ordinary
shares and warrants included in the units. The Class A ordinary shares
and warrants that are separated will trade on the NASDAQ Capital Market
under the symbols “STNL” and “STNLW,” respectively. Those units not
separated will continue to trade on the NASDAQ Capital Market under the
symbol “STNLU.”

This press release shall not constitute an offer to sell or the
solicitation of an offer to buy, nor shall there be any sale of these
securities in any state or jurisdiction in which such offer,
solicitation, or sale would be unlawful prior to registration or
qualification under the securities laws of any such state or
jurisdiction. The offering was made only by means of a prospectus,
copies of which may be obtained from Citigroup Global Markets Inc., c/o
Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, NY
11717, Telephone: (800) 831-9146; Goldman Sachs & Co. LLC, Attn:
Prospectus Department, 200 West Street, New York, NY 10282, Telephone:
(866) 471-2526, fax: (212) 902-9316, email: prospectus-ny@ny.email.gs.com,
or Credit Suisse Securities (USA) LLC, Attention: Prospectus Department,
Eleven Madison Avenue, New York, NY 10010, Telephone: (800) 221-1037,
email: newyork.prospectus@credit-suisse.com.

ABOUT SENTINEL ENERGY SERVICES INC.

Sentinel Energy Services Inc. is a special purpose acquisition entity
focused on the energy services and equipment sectors and was formed for
the purpose of entering into a merger, amalgamation, capital stock
exchange, asset acquisition, stock purchase, reorganization or similar
business combination with one or more businesses. The Company is
sponsored by Sentinel Management Holdings, LLC, an affiliate of CSL
Capital Management, LLC.

FORWARD LOOKING STATEMENTS

This press release may include “forward-looking statements” within the
meaning of Section 27A of the Securities Act of 1933, as amended, and
Section 21E of the Securities Exchange Act of 1934, as amended. All
statements other than statements of historical fact included in this
press release are forward-looking statements. When used in this press
release, words such as “anticipate,” “believe,” “estimate,” “expect,”
“intend” and similar expressions, as they relate to us or our management
team, identify forward-looking statements. Such forward-looking
statements are based on the beliefs of management, as well as
assumptions made by, and information currently available to, the
Company’s management. Actual results could differ materially from those
contemplated by the forward-looking statements as a result of certain
factors detailed in the Company’s filings with the Securities and
Exchange Commission (“SEC”). All subsequent written or oral
forward-looking statements attributable to us or persons acting on our
behalf are qualified in their entirety by this paragraph.
Forward-looking statements are subject to numerous conditions, many of
which are beyond the control of the Company, including those set forth
in the Risk Factors section of the Company’s registration statement and
prospectus for the Company’s initial public offering filed with the SEC.
The Company undertakes no obligation to update these statements for
revisions or changes after the date of this release, except as required
by law.