JOINT FILING AGREEMENT

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

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