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                             July 13, 2020

       Vijay Manthripragada
       President and Chief Executive Officer
       Montrose Environmental Group, Inc.
       1 Park Plaza, Suite 1000
       Irvine, CA 92614

                                                        Re: Montrose
Environmental Group, Inc.
                                                            Registration
Statement on Form S-1
                                                            Response dated July
13, 2020
                                                            File No. 333-239542

       Dear Mr. Manthripragada:

              We have reviewed your correspondence and have the following
comments. In some of
       our comments, we may ask you to provide us with information so we may
better understand your
       disclosure.

              Please respond to this letter by amending your registration
statement and providing the
       requested information. If you do not believe our comments apply to your
facts and
       circumstances or do not believe an amendment is appropriate, please tell
us why in your
       response.

              After reviewing any amendment to your registration statement and
the information you
       provide in response to these comments, we may have additional comments.

       Correspondence submitted on July 13, 2020

       Appendix B
       Recent Developments, page 11

   1.                                                   We note your statement
in your proposed disclosure that your final results "may vary, and
                                                        such variations may be
material." If you choose to disclose preliminary results, you should
                                                        be able to assert that
the actual results are not expected to differ materially from that
                                                        reflected in the
preliminary results. Accordingly, please remove this statement, as it
                                                        implies that investors
should not rely on the information presented.
   2.                                                   Please tell us why you
believe presenting revenue without presenting additional financial
                                                        statement line items
and narrative disclosure related to your costs or expenses would
                                                        permit investors to
draw appropriate conclusions regarding your financial condition. At a
 Vijay Manthripragada
Montrose Environmental Group, Inc.
July 13, 2020
Page 2
         minimum, please discuss whether the trends evidenced in the
preliminary financial results
         for the period covered are consistent with the trends discussed in
Management's
         Discussion and Analysis of Financial Condition and Results of
Operations.
       Please contact Jennifer L  pez at 202-551-3792 or Mara Ransom at
202-551-3264 with
any questions.



FirstName LastNameVijay Manthripragada                       Sincerely,
Comapany NameMontrose Environmental Group, Inc.
                                                             Division of
Corporation Finance
July 13, 2020 Page 2                                         Office of Trade &
Services
FirstName LastName