# Staff Mechanical Engineer at Mariana Minerals

- Company: Mariana Minerals
- What the company does: Mariana Minerals is a software-first, vertically integrated minerals company focused on supplying the minerals critical to modern energy, AI, and defense technologies. Backed by Khosla and a16z.
- Company website: https://marianaminerals.com/
- Type: Startups
- Level: Senior
- Location: Houston, TX
- Work setup: On-site
- Pay: $140K to $190K base salary per year (USD)
- Posted: 2026-10-22
- Apply by: 2026-12-06
- Apply: https://jobs.ashbyhq.com/marianaminerals/c59fd9e0-27b9-4125-bcfc-40569938359e?utm_source=1752vc&utm_medium=careers
- Page: https://www.1752.vc/careers/jobs/mariana-minerals-staff-mechanical-engineer/

## About the role

Mariana Minerals is seeking a highly motivated Staff Mechanical Engineer to support our next-generation minerals processing pilot plant in Houston. You will lead the design, integration, and deployment of pilot-scale mechanical systems and processing equipment used to demonstrate and scale innovative refining technologies for critical minerals. This role is highly hands-on and will play a key role in building and maintaining a first-of-its-kind pilot plant. Found on 1752vc Careers, the job board for startup and VC roles.

## What they're looking for

- B.S., M.S., or PhD in Mechanical Engineering or a related field
- 9+ years of experience in operations, process scale-up, or plant design in minerals processing, chemicals, specialty materials, oil & gas, or related industries
- Demonstrated experience driving equipment design, commissioning, operations, and reliability
- Experience designing and maintaining furnaces, pumps and fluid handling systems, pressure vessels and reactors, piping systems and valves, filtration and separation equipment, and materials handling systems
- Ability to work closely with cross-functional teams including process engineering, operations, and project execution
- Strong troubleshooting and problem-solving skills in hands-on plant environments

Tags: Process Development

Source: 1752vc Careers, https://www.1752.vc/careers/jobs/mariana-minerals-staff-mechanical-engineer/