Mariana Minerals
marianaminerals.com
Actively hiring
Mining Tech
Non-ferrous Metals
Mining
View 23 jobs
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Overview
Technologies
Salaries
Products
People
Growth
Offices
Jobs
Financials
Funding and backers
Total raised
$384M
2 rounds on record
Latest round
$310.5M
Venture round · Jul 2026 · 2 mo ago
Team
89
US Form 5500 (plan participants) · Dec 2025
Hiring now
87
+44 posted in 30 days
Backers
4
In-Q-Tel, Greycroft
The money's age
Fresh money
2 months since the last round · and hiring
Momentum
50/100
hiring for its size, a new city, fresh money
Last sign of life
this month
a posting or a news item
The story so fareach stage dated by its source: the company's releases, the press, registers, filings
Aug 6
Board appointment Samir Kaul, Director · SEC Form D
Jul 22
Raised a round Venture round $310.5M · SEC Form D
Jun 26
First executive search Head of Engineering Programs
Jun 9, 2025
Raised a round Venture round $73.5M · SEC Form D
2024
Founded
Tractionpublic signals, read monthly
Web presence
top 6%
of 133.2M domains by links, Common Crawl
Funding rounds
| Round | Date | Amount | Investors | Source |
|---|---|---|---|---|
| Venture round | Jul 2026 | $310.5M | — | SEC Form D |
| Venture round | Jun 2025 | $73.5M | — | SEC Form D |
Registers and programsofficial lists and records that name the company
| Legal entity | Mariana Minerals Co. | SEC Form D |
Founders and leadersfrom filings, registers and the company's site
Turner CaldwellExecutive Officer, DirectorSEC Form D
Juan Lozano Van De VenExecutive Officer, DirectorSEC Form D
Schuyler Baker TilneyExecutive Officer, DirectorSEC Form D
Backed byfrom the funds' portfolios and accelerator catalogs
In-Q-Tel 
Greycroft 
Andreessen Horowitz 
Khosla Ventures Investors in similar startupsfunds that back the companies most like this one
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How Mariana Minerals hires
Truth index
B 82/100
Median time to fill
40 days
Ghost roles
0%
Stale roles
73%
Reposted roles
0%
Mariana Minerals scores B on the Alion truth index (A is best, E worst), measured over 11 open roles re-checked against its own hiring board: 0% look like ghost listings, 73% have gone stale and 0% are the same role posted again. Its roles close in a median of 40 days. It measures how much of what this employer publishes turns into a real, finite search - not the employer as a workplace. How the index is computed
Overview
Mariana Minerals is a software-first, vertically integrated critical minerals company headquartered in San Francisco, California. Founded in 2024, the company designs, builds, and operates its own domestic mining and refining operations to produce battery-grade lithium, copper cathode, and nickel essential for energy, AI, and defense infrastructure. At the core of its business is MarianaOS, an in-house software suite combining autonomous fleet systems, digital twin geologic modeling, dynamic process control, and LLM-powered capital project management platforms (CapitalProjectOS, MineOS, PlantOS) designed to accelerate commissioning timelines and reduce steady-state operating costs.
Tech stack
Technologies named in job postings at Mariana Minerals over the last 12 months, by layer, with the share of postings for each.
Technologies in use
57
Postings analysed
42
Stack modernity
74/100AI adopter
Languages
Python26%
C++7%
SQL7%
TypeScript5%
Frameworks & libraries
ROS7%
Commander.js2%
PoC Library2%
SciPy2%
Databases
PostgreSQL5%
Snowflake2%
Cloud & platforms
AWS7%
Figma5%
Looker5%
Amazon EKS2%
AI & ML
LLM19%
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Full Mariana Minerals tech stack
57 technologies · by team · pay by technology · changes · similar stacks
Salary insights
Compensation ranges based on this company's open jobs
Median
$185k
Typical range
$90k – $240k
Open positions
48
46
Jobs
Junior
8.7%
Middle
4.3%
Senior
39.1%
Staff
41.3%
Architect
6.5%
| Level | Jobs | Median | Typical range |
|---|---|---|---|
| Junior | 4 | $170k | $90k – $180k |
| Middle | 2 | $164k | $120k – $208k |
| Senior | 18 | $180k | $126k – $220k |
| Staff | 19 | $200k | $170k – $240k |
| Architect | 3 | $200k | $200k – $240k |
Highest paying role
Staff Machine Learning Engineer
$240k
Normalized to USD per year
All salaries at Mariana Minerals
By role, level and city, against the market · 48 jobs with pay
People
Turner Caldwell
Executive Officer, Director
Juan Lozano Van De Ven
Executive Officer, Director
Schuyler Baker Tilney
Executive Officer, Director
Erin Price-Wright
Director
Samir Kaul
Director
Names and roles come from public filings, company registers and the company's own site. Is this you? Correct or remove · How we handle this data
Growth
Hiring Momentum
83/100
Scaling fast
Open positions
86
31 opened / 28 closed in 30 days
Median time-to-fill
41 days
faster than 32% of the market
ATS activity
Every ~4 hours
Today
Hiring Dynamics
+100%
Hiring Focus
The percentage next to each role is its share of the company's job openings over the last 90 days; the arrow shows the shift versus the previous period.
Industrial Engineering
27% ▲
Field & Service
22% ▼
Operations
20% ▼
Product
4% ▲
Backend
3%
Leadership
3% ▲
Actively hiring for Operations (+12 in 30 days)
Activity Timeline
Added Power BI to stack
Oct 2026
Added Linux to stack
Oct 2026
New location: United States
Sep 2026
Added Statsmodels to stack
Sep 2026
Added SciPy to stack
Sep 2026
Added PoC Library to stack
Sep 2026
Added Looker to stack
Sep 2026
Added LLM Guardrails to stack
Sep 2026
Added Computer Vision to stack
Sep 2026
Added Agentic Workflows to stack
Sep 2026
Added VPN to stack
Sep 2026
Added Microsoft Office to stack
Sep 2026
Offices
Where the company hires and what each office is for
Cities
6
Hiring now
6
Countries
1
Busiest office
San Francisco
Loading the map
Headquarters
Builds here
Office with open vacancies
Tap a pin for the office
San Francisco
United States
HQ
43 open roles 44 posted in 90 days 28% engineering 200-500 est. staff $185k Avg Salary
hires for Operations, Industrial Engineering, Backend
Houston
United States
Plant / site
44 open roles 42 posted in 90 days 27% engineering 200-500 est. staff $188k Avg Salary
hires for Industrial Engineering, Operations, Backend
Moab
United States
Plant / site
19 open roles 18 posted in 90 days 50-200 est. staff $144k Avg Salary
hires for Operations, Field & Service, Industrial Engineering
Ann Arbor
United States
Engineering / R&D
14 open roles 9 posted in 90 days 71% engineering 50-200 est. staff $200k Avg Salary
hires for AI/ML, Backend, Data Science
Joaquin
United States
Plant / site
5 open roles 5 posted in 90 days 10-50 est. staff
hires for Field & Service, Industrial Engineering
Austin
United States
1 open roles 1 posted in 90 days 1-10 est. staff
hires for Industrial Engineering
Jobs
≈ $173k – $353k per year (Estimated) • In office • Full-Time • 8+ years exp • San Francisco
Python
TypeScript
PostgreSQL
AI/ML
AI Agents
LLM
DevOps
AWS
Apply
$140k – $200k per year • In office • Full-Time • 5+ years exp • Bachelor's Degree • San Francisco • Houston • Ann Arbor
Python
C++
Machine Learning
DevOps
Linux
Robotics
ROS
Apply
$140k – $200k per year • In office • Full-Time • 8+ years exp • San Francisco • Houston • Ann Arbor
Python
TypeScript
PostgreSQL
Snowflake
AI/ML
Prefect
LLM
Machine Learning
DevOps
Terraform
Helm
Loki
Prometheus
Pulumi
CI/CD
GitOps
ArgoCD
AWS
Kubernetes
Grafana
Karpenter
Amazon EKS
DNS
Apply
≈ $150k – $286k per year (Estimated) • In office • Full-Time • Houston • San Francisco
Apply
$176k – $212k per year • In office • Full-Time • 2+ years exp • PhD • San Francisco • Houston • Ann Arbor
Python
Time Series Forecasting
Machine Learning
Apply
$176k – $212k per year • In office • Full-Time • 6+ years exp • San Francisco • Houston • Ann Arbor
Computer Vision
AI Agents
LLM
LLM Guardrails
Agentic Workflows
Machine Learning
Apply
$115k – $208k per year • In office • Full-Time • 4+ years exp • San Francisco • Houston • Ann Arbor
LLM
Machine Learning
Apply
$115k – $208k per year • In office • Full-Time • 4+ years exp • San Francisco • Houston • Ann Arbor
AI Agents
LLM
Agentic Workflows
Machine Learning
Chips/EDA
PoC Library
Analytics
Looker
Apply
$140k – $173k per year • In office • Full-Time • 3+ years exp • Bachelor's Degree • San Francisco • Houston • Ann Arbor
Python
SQL
SciPy
LLM
Statsmodels
Analytics
Looker
Apply
$150k – $200k per year • In office • Full-Time • 4+ years exp • Bachelor's Degree • San Francisco
Apply
≈ $149k – $269k per year (Estimated) • In office • Full-Time • 4+ years exp • Bachelor's Degree • Moab
Apply
$80k – $160k per year • In office • Full-Time • 2+ years exp • San Francisco • Houston • Ann Arbor
LLM
Apply