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Appointment of Brad George as CEO and of Thomas Masney as Non-executive Director

Management Changes

17 July 2020

Orosur Mining Inc. ('Orosur' or the 'Company')

Appointment of Brad George as CEO and of Thomas Masney as Non-executive Director

Orosur Mining Inc. ("Orosur" or "the Company") (TSX/AIM: OMI), a South American -focused gold

developer and explorer, is delighted to announce the appointment of Brad George as CEO of the

Company in place of Ignacio Salazar who leaves the Company today after a three month period of

transition, as announced on 20 April 2020.

Brad George was appointed to the Board of Orosur as a non-executive director on 1 May this year and

has already made significant contributions to the Company. As previously announced, Brad has a long

history in South America, having managed, assessed, and financed projects and companies in a range

of countries across the continent. In particu lar, Brad's significant experience in gold exploration and

development will be of great benefit to the Company.

The Company is also pleased to announce the strengthening of the Board through the appointment

of Thomas Masney who will be joining the Board today as a non -executive director and Chairman of

the audit committee. He will replace HD Lee who resigns today from the Board of Orosur.

Thomas brings a wealth of quoted company experience to Orosur. He has been CFO of both TSX and

AIM listed companies. He is a CPA and has worked internationally for both mining and corporates in

other sectors, having trained initia lly with EY and PWC. He has strong links with the investor and

professional services community in Toronto which will serve the Company well in its activities.

Louis Castro, Chairman of Orosur, said: "I am delighted that Brad has agreed to step up to bec ome

CEO of the Company. Brad is ideally suited to lead the Company into its new phase of development at

its flagship project at Anza in Colombia, in partnership with Newmont, whilst also assessing entry into

new projects. I also look forward to working with Thomas who brings strong governance experience

and many contacts in Toronto and further afield.

I would like to thank HD for his hard work and contribution to the Company and we wish him all the

very best in his future endeavours.

We announced Ignacio´s departure on 20 April 2020, and we hereby acknowledge and thank him for

his full dedication to the company during the 3-month transition period"

Regulatory Disclosures

The following disclosures are required regarding Thomas Peter Masney's appointment, aged 67,

pursuant to Rule 17 and Schedule Two paragraph (g) of the AIM Rules for Companies:

Current directorships and partnerships:

• Pond Naturals Inc.

• Paige Growth Technologies Inc.

Past directorships and partnerships held over the last 5 years:

• Pond Technologies Inc.

Thomas has no direct or indirect interest in the Company's ordinary shares.

No further disclosure is required pursuant to AIM Rule 17 and paragraph (g) to Schedule Two of the

AIM Rules for Companies.

For further information, please contact:

Orosur Mining Inc

Louis Castro, Chairman,

Brad George, CEO

[email protected]

Tel: +1 (778) 373-0100

SP Angel Corporate Finance LLP - Nomad & Joint Broker

Jeff Keating / Caroline Rowe

Tel: +44 (0) 20 3 470 0470

The information contained within this announcement is deemed by the Company to constitute inside information

as stipulated under the Market Abuse Regulation ("MAR"). Upon the publication of this announcement via

Regulatory Information Service, this inside information is now considered to be in the public domain.

About Orosur Mining Inc.

Orosur Mining Inc. (TSX: OMI; AIM: OMI) is a precious metals developer and explorer focused on

identifying and advancing gold projects in Sout h America. The Company operates in Colombia and

Uruguay.