EXHIBIT 99.1

JOINT FILING AGREEMENT
PURSUANT TO RULE 13d-1(k)

In accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of them of a statement on Schedule 13G (including amendments thereto) with respect to the shares of Common Stock, par value $1.00 per share, of McDermott International, Inc., a Panamanian corporation, and further agree that this Joint Filing Agreement be included as Exhibit 1 to such Schedule 13G. In evidence thereof, the undersigned hereby execute this agreement this 4^th  day of October, 2019.

CHATTERJEE CHARITABLE FOUNDATION
By:	/s/ Purnendu Chatterjee
	Name:	Purnendu Chatterjee
	Title:	Trustee

MCPI HOLDINGS LIMITED
By:	/s/ Purnendu Chatterjee
	Name:	Purnendu Chatterjee
	Title:	Director

LABVANTAGE SOLUTIONS TECHNOLOGIES LIMITED
By:	/s/ Purnendu Chatterjee
	Name:	Purnendu Chatterjee
	Title:	Director

TCG LIFESCIENCES LIMITED
By:	/s/ Purnendu Chatterjee
	Name:	Purnendu Chatterjee
	Title:	Director

CSL HOLDINGS LIMITED
By:	/s/ Purnendu Chatterjee
	Name:	Purnendu Chatterjee
	Title:	Director

CHATTERJEE FUND MANAGEMENT, L.P.
By:	/s/ Purnendu Chatterjee
	Name:	Purnendu Chatterjee
	Title:	General Partner
	/s/  Purnendu Chatterjee
	Purnendu Chatterjee