Sierra Metals welcomes Koko Yamamoto to the Board of Directors as Chair of its Audit Committee

– CANADA, Toronto –   Sierra Metals Inc. (TSX: SMT | BVL: SMT | NYSE: SMTS) today announced the appointment of Ms. Koko Yamamoto to its Board of Directors effective immediately. Ms. Yamamoto will also be joining Sierra Metals’ Audit Committee as its Chairperson.

J. Alberto Arias, Chairman of Sierra Metals, commented: “On behalf of the Board and Management, I would like to welcome Koko to the Sierra Metals Board of Directors. Koko’s experience in corporate accounting and reporting makes her a valuable addition as an independent director to our Board. We believe that Koko will help Sierra Metals execute on its considerable growth plans and strategic opportunities that it has available at all its properties.”

About Koko Yamamoto

Ms. Yamamoto is a chartered professional accountant with over 19 years’ experience. She is a partner at McGovern, Hurley LLP, a CPAB registered firm, since 2003, and her practice includes a focus on assurance engagements for reporting issuers in the resource sector. Ms. Yamamoto is involved in initial public offerings and private placements, mergers and acquisitions. She is currently a director for Largo Resources Inc. as well as Chair of the Largo Resources Audit Committee. Ms. Yamamoto is registered as a panel auditor with the Investment Industry Regulatory Organization of Canada (IIROC), which enables her to conduct audits of investment dealers. Ms. Yamamoto obtained her CPA CA designation in 2001 and holds a Bachelor of Commerce from the University of British Columbia.

About Sierra Metals

Sierra Metals Inc. is a Canadian based growing polymetallic mining company with production from its Yauricocha Mine in Peru, and its Bolivar and Cusi Mines in Mexico. The Company is focused on increasing production volume and growing mineral resources. Sierra Metals has recently had several new discoveries and still has additional brownfield exploration opportunities at all three Mines in Peru and Mexico that are within or close proximity to the existing Mines. Additionally, the Company has large land packages at all three Mines with several prospective regional targets providing longer-term exploration upside and mineral resource growth potential.

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