# Sergio Rivera

Vice President of Exploration

## Career chronology

- **Current role; exact role start is not established: Marimaca Copper** — Vice President of Exploration. [Sergio Rivera management page](<https://marimaca.com/sergio-rivera/>) (Sergio Rivera biography)

## Education and qualifications

### Reported education and credentials [rivera_education]

Undated · issuer reported · low materiality

Issuer reports bachelor and masters degrees in geology from Universidad Católica del Norte and professional memberships.

**Attribution:** Responsibility not applicable. The listed degrees and memberships have not been independently verified.

**Relevance:** Relevant to the individual’s stated role.

[Sergio Rivera management page](<https://marimaca.com/sergio-rivera/>) (biography)

## Personal achievements

### Relevant reported experience [rivera_career]

Career to October 2026 · issuer reported · medium materiality

The issuer reports Rivera joined in November 2011 and assumed full exploration responsibility in June 2018.

**Attribution:** Individual involvement documented. The role history is issuer-reported; individual contribution and employment dates are not fully independently established.

**Relevance:** Relevant to the present mining, financing, legal or project role.

[Sergio Rivera management page](<https://marimaca.com/sergio-rivera/>) (Sergio Rivera biography)

### Documented exploration contribution [rivera_discovery]

2023 · documented · medium materiality

The independent 2023 NCL technical report credits Rivera and Kovacic with significant contributions to project exploration and report implementation. It estimates mineral resources; these do not establish actual production or independently attribute the whole discovery to one individual.

**Attribution:** Individual involvement documented. NCL credits both as members of a wider technical effort.

**Relevance:** Relevant to evidence of exploration delivery.

[Updated mineral resource technical report](<https://minedocs.com/27/Marimaca-TR-05182023.pdf>) (page 25 section 3)

## Suitability for the current role

### Role-fit assessment [rivera_fit]

October 2026 · analyst inference · medium materiality

The reported background is relevant to vice president of exploration, subject to the substantial limits of the available screening.

**Attribution:** Responsibility not applicable. Analyst judgment based on the cited roles; not a finding about character.

**Relevance:** Shows the evidence and uncertainty behind the team assessment.

[Sergio Rivera management page](<https://marimaca.com/sergio-rivera/>) (Sergio Rivera biography)

## Evidence gaps

- Independent verification of education, memberships and dates is incomplete.

- Full previous-employer outcomes and person-specific public court, regulatory, safety and environmental records have not been exhaustively reviewed.