Thursday, September 17, 2026
MiningNewsTerminal
Thursday, September 17, 2026 Admin

GRSL.V ·

GR Silver Mining Enhances its Mexican Leadership Team Appointing Ing. Cástulo Molina Sotelo as Country Manager

Management Changes

GR Silver Mining Enhances its Mexican

Leadership Team Appointing Ing. Cástulo

Molina Sotelo as Country Manager

VANCOUVER, BC

,

Nov. 17, 2025

/CNW/ -

GR Silver Mining Ltd.

("

GR Silver Mining

" or the

"

Company

") (TSXV:GRSL) (OTCQB:GRSLF) (FRANKFURT: GPE) is pleased to announce the

appointment of

Dr. Cástulo

Molina Sotelo

as

Country Manager,

Mexico

.

Dr. Molina brings more than 35 years of experience in mineral exploration, geology, and the technical

and operational management of major precious metal projects in

Mexico

. He is a specialist in

epithermal precious metal exploration, operations management, and satellite image processing, and

has held senior executive and leadership positions in key mining institutions across the country.

During his tenure with Coeur Mining, Inc. (2007-2021), he played a pivotal role in the exploration,

discovery, and development of the Palmarejo mine. He served as Senior Vice President for

Mexico

,

where he coordinated multidisciplinary teams, legal, and technical, through all stages of project

development. Dr. Molina is a Certified Professional Geologist (CPG) with the American Institute of

Professional Geologists (AIPG) and is fluent in both Spanish and English.

Dr. Molina is also a founding member of the Chihuahua State Mining Cluster (CLUMIN) and has

served for seven years on the Board of Directors of the Mexican Chamber of Mines (CAMIMEX). In

both capacities, he has fostered strong relationships across the mining industry and with regulatory

authorities.

Earning his degree as Ingeniero Geólogo from the Universidad Autónoma de Chihuahua, Dr. Molina

went on to obtain an M.Sc. in Structural Geology and a Ph.D. in Geological Sciences, both from the

University of Texas at El Paso

.

GR Silver Mining's President and CEO,

Marcio Fonseca

, commented, "

Dr. Molina's extensive

hands-on experience in exploration, permitting, and the development of large silver projects in

Mexico

– from early-stage exploration through to production – will be a valuable asset to GR Silver

Mining as the Company embarks on a transformational phase in 2026. His proven track record,

including leadership at Palmarejo and other major silver projects in

Mexico

, strengthens our

confidence as we prepare for an active year ahead, marked by a significant step-out drilling

program at the San Marcial Area of the Plomosas Silver Project and continued advancements and

developments in

Mexico

."

GR Silver Mining's Country Manager, Cástulo

Molina Sotelo

, commented,

"I am very pleased to join

the GR Silver Mining team and excited about the opportunity to contribute to the successful

advancement and development of the Company's projects in

Mexico

. I look forward to working

closely with the team to build upon GR Silver Mining's strong technical foundation and create long-

term value for our stakeholders."

About the Plomosas Project

The Plomosas Project, including the recent high-grade silver discovery in the San Marcial SE Area,

is progressing in 2025 as an emerging high-grade silver district located in southwestern edge of the

Sierra Madre Occidental,

Sinaloa, Mexico

. The Plomosas Project, covering 7,823 ha, including the

historical Plomosas Underground mine. benefits from mine infrastructure, road access and existing

permits associated with past-producing mining sites. The district contains intermediate to low-

sulfidation epithermal silver and gold mineralization, hosted in hydrothermal breccias and veins.

Recent success in exploration and drilling has delineated wide, high-grade, shallow hydrothermal

breccias in the San Marcial Area, including the SE Area discovery, where step-out drilling is

underway in 2025, aiming for continuous resource growth. At the historical Plomosas Mine, where

Grupo Mexico operated the underground mine from 1985 to 2000, exploration, underground

sampling and metallurgical programs are being conducted to support future decisions regarding the

implementation of a Bulk Sampling Test Mining Program

About GR Silver Mining Ltd

.

GR Silver Mining is a Canadian-based,

Mexico

-focused mineral exploration company engaged in

cost-effective silver-gold resource expansion on its 100%-owned assets, located on the eastern

edge of the Rosario Mining District, in the southeast of Sinaloa State,

Mexico

. GR Silver Mining

controls 100% of the Plomosas Project, including the former Plomosas underground mine and wide,

high-grade silver mineralized zones at the San Marcial Area. Recent discoveries in the 78 km² of

highly prospective, advanced-stage exploration concessions position the Company well for resource

expansion at the Plomosas Project.

GR Silver Mining Ltd.

Márcio Fonseca, President & CEO

Cautionary Statement Regarding Forward-Looking Information

This press release contains "forward-looking statements" within the meaning of applicable

Canadian securities legislation and information that are based on the beliefs of management and

reflect the Company's current expectations. When used in this press release, the words "estimate",

"project", "belief", "anticipate", "intend", "expect", "plan", "predict", "may" or "should" and the

negative of these words or such variations thereon or comparable terminology are intended to

identify forward-looking statements and information. Such statements and information reflect

the current view of the Company. Risks and uncertainties may cause actual results to differ

materially from those contemplated in those forward-looking statements and information. By their

nature, forward-looking statements involve known and unknown risks, uncertainties and other

factors which may cause our actual results, performance or achievements, or other future events,

to be materially different from any future results, performance or achievements expressed or

implied by such forward-looking statements.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is

defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy

or accuracy of this press release.

SOURCE

GR Silver Mining Ltd.

View original content to download multimedia:

http://www.newswire.ca/en/releases/archive/November2025/17/c3855.html

%SEDAR: 00040149E

For further information:

For further information, please contact: Telephone: +1 236-270-2057,

Email: [email protected]

CO: GR Silver Mining Ltd.

CNW 06:00e 17-NOV-25