EXHIBIT 99.1

This Statement on Form 4 is filed jointly by the Reporting Persons listed below. The principal business address of each of these Reporting Persons is 333 South Grand Avenue, 28th Fl., Los Angeles, CA 90071.

Name of Designated Filer: OAKTREE CAPITAL GROUP, LLC

Date of Event Requiring Statement: February 8, 2021

Issuer Name and Ticker or Trading Symbol: IEA

	OCM FIE, LLC

	By:	/s/ Henry E. Orren
	Name:	Henry E. Orren
	Title:	Vice President

	OAKTREE CAPITAL MANAGEMENT, L.P.

	By:	/s/ Henry E. Orren
	Name:	Henry E. Orren
	Title:	Vice President

	OAKTREE CAPITAL MANAGEMENT GP, LLC

	By:	/s/ Henry E. Orren
	Name:	Henry E. Orren
	Title:	Vice President

	ALTAS OCM HOLDINGS, LLC

	By:	/s/ Henry E. Orren
	Name:	Henry E. Orren
	Title:	Vice President

	BROOKFIELD ASSET MANAGEMENT INC.

	By:	/s/ Jessica Diab
	Name:	Jessica Diab
	Title:	Vice President, Legal & Regulatory

	PARTNERS LIMITED

	By:	/s/ Brian Lawson
	Name:	Brian Lawson
	Title:	President

	OT POF IEA PREFERRED B AGGREGATOR, L.P.

	By:	/s/ Henry E. Orren
	Name:	Henry E. Orren
	Title:	Vice President

	OT POF IEA PREFERRED B AGGREGATOR GP, LLC

	By:	/s/ Henry E. Orren
	Name:	Henry E. Orren
	Title:	Vice President

OCM FIE, LLC 4