JFL GP Investors III SC 13D NRC Group Holdings Corp.

Exhibit 99.1

JOINT FILING AGREEMENT

Under Rule 13d-1(k)(1) of the Securities Exchange Act of 1934, the undersigned agree to the joint filing of this Schedule 13D with respect to the shares of Common Stock, par value $0.0001 per share, of NRC Group Holdings Corp. beneficially owned by each of them.

IN WITNESS WHEREOF, the undersigned executed this Joint Filing Agreement as of October 26, 2018.

JFL-NRC-SES Partners, LLC
By:	/s/ David Rattner
Name:	David Rattner
Title:	Secretary
JFL-NRC Partners, LLC
By:	/s/ David Rattner
Name:	David Rattner
Title:	Secretary
JFL-NRC (JA) Holdings, LLC
By:	/s/ David Rattner
Name:	David Rattner
Title:	Secretary
JFL-NRC Int. (JA) Holdings, LLC
By:	/s/ David Rattner
Name:	David Rattner
Title:	Secretary
JFL-SES Partners, LLC
By:	/s/ David Rattner
Name:	David Rattner
Title:	Secretary
JFL-SES Holdings, LLC
By:	/s/ David Rattner
Name:	David Rattner
Title:	Secretary
JFL-SES (JA) Holdings, LLC
By:	/s/ David Rattner
Name:	David Rattner
Title:	Secretary
JFL-SES Int. (JA) Holdings, LLC
By:	/s/ David Rattner
Name:	David Rattner
Title:	Secretary

JFL AIV Investors III-JA, L.P.
By: JFL GP Investors III, LLC
Its: General Partner
By:	/s/ David Rattner, attorney-in-fact
Name:	David Rattner
JFL GP Investors III, LLC
By:	/s/ David Rattner, attorney-in-fact
Name:	David Rattner
JFL GP Investors IV, LLC
By:	/s/ David Rattner, attorney-in-fact
Name:	David Rattner
JFL Equity Investors IV, L.P.
By: JFL GP Investors IV, LLC
Its: General Partner
By:	/s/ David Rattner, attorney-in-fact
Name:	David Rattner
JFL-NRCG Holdings III, LLC
By:	/s/ David Rattner
Name:	David Rattner
Title:	Secretary
JFL-NRCG Holdings IV, LLC
By:	/s/ David Rattner
Name:	David Rattner
Title:	Secretary
JFL-NRCG Annex Fund, LP
By: JFL GP Investors III, LLC
Its: General Partner
By:	/s/ David Rattner, attorney-in-fact
Name:	David Rattner