EXHIBIT A
Pursuant to Rule13d-1(k) of Regulation13D-G of the General Rules and Regulations of the Securities and Exchange Commission under the Securities Exchange Act of 1934, as amended, the undersigned agrees that the statement to which this Exhibit is attached is filed on behalf of each of them in the capacities set forth below.
Dated: February 26, 2019 | SOTER CAPITAL, LLC | |||||
By: | /s/ Mary Ann Sigler | |||||
Name: Mary Ann Sigler Title: President and Treasurer | ||||||
SOTER CAPITAL HOLDINGS, LLC | ||||||
By: | /s/ Mary Ann Sigler | |||||
Name: Mary Ann Sigler Title: President and Treasurer | ||||||
PE SOTER HOLDINGS, LLC | ||||||
By: | /s/ Mary Ann Sigler | |||||
Name: Mary Ann Sigler Title: President and Treasurer | ||||||
PLATINUM EQUITY CAPITAL SOTER PARTNERS, L.P. | ||||||
By: | Platinum Equity Partners III, LLC, its general partner | |||||
By: | Platinum Equity Investment Holdings III, LLC, its senior managing member | |||||
By: | /s/ Mary Ann Sigler | |||||
Name: Mary Ann Sigler Title: Vice President and Treasurer | ||||||
PLATINUM EQUITY PARTNERS III, LLC | ||||||
By: | Platinum Equity Investment Holdings III, LLC, its senior managing member | |||||
By: | /s/ Mary Ann Sigler | |||||
Name: Mary Ann Sigler Title: Vice President and Treasurer | ||||||
PLATINUM EQUITY INVESTMENT HOLDINGS III, LLC | ||||||
By: | /s/ Mary Ann Sigler | |||||
Name: Mary Ann Sigler Title: Vice President and Treasurer | ||||||
PLATINUM EQUITY, LLC | ||||||
By: | /s/ Mary Ann Sigler | |||||
Name: Mary Ann Sigler Title: Executive Vice President, Chief Financial Officer and Treasurer | ||||||
Tom Gores | ||||||
/s/ Mary Ann Sigler | ||||||
Mary Ann Sigler | ||||||
Attorney-in-Fact |