EX-10.9





 Exhibit 10.9 

October 14, 2014 
 Ms. Nasym Afsari 

RE: Nasym Afsari – Montrose Offer Letter 
 Dear
Ms. Afsari: 
 It is with great pleasure that I confirm our offer to join Montrose Services, LLC, a subsidiary of Montrose Environmental Group, Inc.
(“Montrose” or “Company”), as General Counsel. You will report to Jeremiah Yu, Co-Chief Executive Officer, and Nina Prasad, Co-Chief Executive Officer, and will be based out of Irvine,
California. Please carefully read the terms and conditions of this offer. 
 Compensation 

Your annual base salary will be $175,000 (currently paid in bi-weekly installments, minus applicable taxes and
deductions). This position is considered an exempt position for purposes of federal wage-hour law, which means that you will not be eligible for overtime pay in accordance with local labor laws. You will have the opportunity to be awarded a
discretionary bonus and a $5,000 sign on bonus paid at the end of the year. 
 Additionally, you will be awarded upon your start date the option to acquire
up to 1,250 shares of Montrose. The option to acquire these shares will vest 1/3 at the first anniversary of your award date, 1/3 at the second anniversary of your award date, and 1/3 at the third of your award date. 

Trial Period 
 During the first 90 days of employment, you
are in your trial period with the Company. This means that you or we may end your employment at any time, with or without notice. After successful completion of 90 days, you will be considered a regular,
at-will employee and will be given 50 hours of Paid-Time Off (PTO). In addition, you will begin accruing PTO based on your hours worked up to a maximum of five (5) weeks. You will accrue a total of five
(5) weeks of PTO annually. 
 Benefits 
 In
addition to your compensation, you will be eligible to receive the benefits which are offered to Montrose employees. These benefits are described in the enclosed materials. 

Expense Reimbursements 
 All employee work related
expenses will be reimbursed through company Employee Business Expense Reports process. 
 Start Date of Employment 

You should expect to commence employment no later than November 3, 2014. 

Employment Policies 
 On your first day of employment, you
will receive a copy of the employee handbook, which describes the Company’s policies and procedures that will govern certain aspects of your employment. Please be sure to review the handbook and sign and return the acknowledgement of receipt
page at the end of the handbook. These policies may be updated from time to time. 

  

					
		  	 Montrose Environmental Group, lnc.

2 Park Plaza, Suite 1120, Irvine, CA 92614 • T: 949. 988.3500 • F: 949.988.3514

www.montrose-env.com
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 Job Offer Contingencies 

This offer of employment is conditional upon the following: 
  

	 	I.	 You providing Montrose with evidence of your U.S. citizenship or proof of your legal right to live and work in
this country. (See enclosed list of appropriate documents as described on the Department of Homeland Security, Form 1-9.) We are required by federal law to examine documentation of your employment eligibility.
Note: This Company participates in e-verify. 


  

	 	II.	 Because driving of company vehicles may be a requirement of the job, you must present to the Company your
current driver’s license. The license and your driving record must be acceptable to our insurance company. 


  

	 	III.	 Successful passing of a pre-employment drug screening will be required.
Successful passing of reference, background or credit checks, and a physical capacity examination may be required. Montrose must receive a full release to work or set of limitations, if applicable, in writing, by the examining physician stating that
you can fulfill all essential job duties with or without reasonable accommodation. 


 It is important that you bring the correct
documents, listed in items I and II, on your first day of active service with Montrose. You cannot begin your employment until requirements I-III outlined above are satisfied. 

This offer of employment, if not previously accepted by you, will expire seven days from the date of this letter. If you wish to accept the
offer, please sign in the place provided below and return it to. Please be aware that the Company is an at-will employer and neither this letter nor any other oral or written representations may be considered
a contract for any specific period of time. 
 We look forward to welcoming you to Montrose. Please confirm your acceptance of this offer by signing and
returning a copy of this letter to: 
 Yvonne Senouci 
 Vice
President, Human Resources 
 Montrose Environmental Group, Inc. 

2 Park Plaza, Suite 1120 
 Irvine, CA 92614 

*** 
 Should you have any questions about starting with the
Company, please do not hesitate to contact me or a representative from the Human Resources Department (hr@montrose-env.com). 
  

  

					
		  	 Montrose Environmental Group, lnc.

2 Park Plaza, Suite 1120, Irvine, CA 92614 • T: 949. 988.3500 • F: 949.988.3514

www.montrose-env.com
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 Sincerely, 

/s/ Jeremiah Yu 
 Jeremiah Yu 

Co-Chief Executive Officer 
 Montrose Environmental Group, Inc.

 Agreed and acceptance of Montrose Offer Letter 
 Dated
October 10, 2014: 
  

			
	Signature:	 	 /s/ Nasym Afsari

		 	Nasym Afsari
		
	Date:	 	10/14/2014

  

  

					
		  	 Montrose Environmental Group, lnc.

2 Park Plaza, Suite 1120, Irvine, CA 92614 • T: 949. 988.3500 • F: 949.988.3514

www.montrose-env.com
	  	Page | 3 of 3