Century Aluminum (CENX) 10-K 2017 FY Annual report

EXHIBIT 24.1

POWER OF ATTORNEY

I hereby constitute and appoint Jesse E. Gary and Morgan F. Walbridge as my true and lawful attorney-in-fact and agent, with full power of substitution, for me and in my name, in any and all capacities, to sign on my behalf the Annual Report on Form 10-K of Century Aluminum Company for the fiscal year ended December 31, 2017, and any amendment or supplement thereto; and to file such Annual Report on Form 10-K, and any such amendment or supplement, with the Securities and Exchange Commission and any other appropriate agency pursuant to applicable laws and regulations.

IN WITNESS WHEREOF, I have hereunto set my hand this 28th day of February 2018.

/s/ Terence Wilkinson

Name: Terence Wilkinson

Director

Century Aluminum Company

POWER OF ATTORNEY

I hereby constitute and appoint Jesse E. Gary and Morgan F. Walbridge as my true and lawful attorney-in-fact and agent, with full power of substitution, for me and in my name, in any and all capacities, to sign on my behalf the Annual Report on Form 10-K of Century Aluminum Company for the fiscal year ended December 31, 2017, and any amendment or supplement thereto; and to file such Annual Report on Form 10-K, and any such amendment or supplement, with the Securities and Exchange Commission and any other appropriate agency pursuant to applicable laws and regulations.

IN WITNESS WHEREOF, I have hereunto set my hand this 28th day of February 2018.

/s/ Jarl Berntzen

Name: Jarl Berntzen

Director

Century Aluminum Company

POWER OF ATTORNEY

I hereby constitute and appoint Jesse E. Gary and Morgan F. Walbridge as my true and lawful attorney-in-fact and agent, with full power of substitution, for me and in my name, in any and all capacities, to sign on my behalf the Annual Report on Form 10-K of Century Aluminum Company for the fiscal year ended December 31, 2017, and any amendment or supplement thereto; and to file such Annual Report on Form 10-K, and any such amendment or supplement, with the Securities and Exchange Commission and any other appropriate agency pursuant to applicable laws and regulations.

IN WITNESS WHEREOF, I have hereunto set my hand this 28th day of February 2018.

/s/ Errol Glasser

Name: Errol Glasser

Director

Century Aluminum Company

POWER OF ATTORNEY

I hereby constitute and appoint Jesse E. Gary and Morgan F. Walbridge as my true and lawful attorney-in-fact and agent, with full power of substitution, for me and in my name, in any and all capacities, to sign on my behalf the Annual Report on Form 10-K of Century Aluminum Company for the fiscal year ended December 31, 2017, and any amendment or supplement thereto; and to file such Annual Report on Form 10-K, and any such amendment or supplement, with the Securities and Exchange Commission and any other appropriate agency pursuant to applicable laws and regulations.

IN WITNESS WHEREOF, I have hereunto set my hand this 28th day of February 2018.

/s/ Wilhelm van Jaarsveld

Name: Wilhelm van Jaarsveld

Director

Century Aluminum Company