---
title: 'Mechanical Engineer, Plant Process Systems at Antora Energy'
canonical: 'https://feeny.ai/job/mechanical-engineer-plant-process-systems-antora-energy-san-jose-tb6r48ka22t7'
type: 'job'
last_seen: '2026-10-14'
---

# Mechanical Engineer, Plant Process Systems at Antora Energy

- **Company:** Antora Energy
- **Location:** San Jose, CA
- **Posted:** 2026-10-09
- **Last confirmed live:** 2026-10-14
- **Apply:** https://job-boards.greenhouse.io/antora/jobs/6217721004

## Job description

Antora Energy delivers affordable, reliable energy to industry, data centers, and the grid. Our thermal batteries turn low-cost electricity into always-on heat and power, without supply-constrained critical minerals or multi-year construction timelines.

We are growing our company with people who put team and mission first, value connection through laughter and joy, and work with humility and openness. We are committed to building a diverse, passionate, and creative team dedicated to a future powered by abundant, clean, low-cost energy.

Position Summary

Antora Energy is seeking a self-driven and passionate individual to join our engineering team to deliver zero-carbon industrial heat and power with our novel solid state thermal battery. We are a tight-knit team that loves what we do and we strive to have an impact, working with humility and openness while building lifelong relationships along the way. The Mechanical Engineer will scope, define, and design novel mechanical systems and components for balance-of-plant (BOP) process systems for Antora Energy’s thermal energy storage projects across test and commercial sites. You will be a key technical member of a cross-functional and rapidly growing organization. Your work will directly contribute to the testing and commercial deployment of an innovative long-duration energy storage technology.

You will be responsible for mechanical design of high-temperature heat transfer and process fluid systems — piping, pressure vessels, heat exchangers, and steam generation equipment — operating at elevated temperature and MW scale.

Roles & Responsibilities

- Full lifecycle ownership of plant mechanical components and system
- Develop detailed mechanical design for first of a kind pressure vessels, piping and process components, meeting critical performance, cost and scalability requirements.
- Perform thermal-mechanical analysis of hot components: differential thermal expansion between coupled structures, creep, thermal cycling/fatigue, thermal shock, and insulation/heat-loss trade-offs.
- Select valves, seals, instruments, and fittings for hot process fluid service (gas, liquid, or two-phase), including leak-tightness, material compatibility, and actuation at temperature.
- Identify, develop and work with vendors enabling design execution
- Create and implement test plans to validate performance, assembly and lifetime

## Key Qualifications

- Bachelors or equivalent in an engineering field (e.g. chemical, mechanical,  industrial, etc.) and/or 4+ years’ experience in industrial applications engineering (oil & gas, chemicals, power plants, etc.)
- Demonstrated experience solving novel engineering problems through commercial deployment
- Experience with industrial mechanical equipment: Pressure Vessels, Pumps, Heat Exchangers, Air Coolers, Fans, Tanks, Piping, Valves.
- Experience designing equipment for elevated-temperature service (>400 °C): materials selection, allowable evaluation, high-temp sealing.
- Understanding of process-fluid hazards and their mechanical design implications (inert gas asphyxiation, hot fluid release, freeze/solidification, corrosion).
- Working knowledge of piping and pressure vessel codes, including ASME BPVC, ASME B31, PED 2014/68/EU, CSA B51, etc

Additional Qualifications Desired

- Deep engineering experience and intuition, ideally with background in:
- Multi-wall, jacketed, trace-heated, or vacuum-insulated piping system experience
- Familiar with concentrated solar, HRSG/boiler, nuclear primary systems, industrial furnaces, or cryogenic process equipment
- Use of one or more of AutoCAD, Solidworks, COMSOL, ANSYS,
- Holds a PE in one or more related disciplines

Work Location:  Onsite - San Jose, CA

Salary Range:  $154,000 - 185,000

Salary Basis:  Annually

Please note that the salary range listed above reflects Antora Energy's estimated pay for this position. The actual salary offered will be within the posted range and determined based on several factors including but not limited to a candidate's experiences, credentials and expertise, as they pertain to the position's requirements.

In addition to a competitive base salary, Antora Energy’s Total Rewards program includes equity compensation in the form of stock options, a premium health benefits package with life and disability insurance, a 401K plan with employer contributions, flexible spending accounts, and an industry leading paid-time-off policy that features flexible and inclusive holiday observance, as well as paid volunteer time off.

#LI-Onsite

#LI-Onsite https://diversityjobs.com/employer/top-diversity-employers?utm_campaign=TopEmployer&utm_medium=badge  When it comes to stopping climate change, we need everyone. We believe that having a diversity of backgrounds and experiences strengthens all of us, and we strive to create an environment where every one of us is empowered to create meaningful change.

## About Antora Energy

## Company Overview
- **One-liner**: Antora Energy manufactures and deploys modular thermal batteries that convert low-cost, intermittent clean electricity into reliable, always-on heat and power for global industrial facilities and data centers.
- **Entity Type**: Private (Series B)
- **Headquarters**: San Jose, California, United States
- **Founded**: 2018
- **Founders**: Justin Briggs, Andrew Ponec, David Bierman

## Core Business
- **Primary industry/industries**: Renewable Energy Power Generation, Thermal Energy Storage, Industrial Decarbonization
- **Target customers**: Large-scale industrial energy users (biofuels, refining, pulp & paper, steel & iron, chemicals, mining, concrete & lime, food & beverage) and data center operators (B2B, Enterprise).
- **Mission or purpose statement**: “We are here to power global industry with clean energy.” The company aims to make cheap, clean energy the standard that powers global industry.

## Products & Services
- **Thermal Battery System**: A modular, factory-built energy storage system that uses solid carbon (one of the safest, most stable materials on earth) to store surplus clean electricity as heat. It delivers always-on heat and power for industrial operations, scales from megawatts to gigawatts, and is designed for low cost, rapid deployment, and massive scale.
- **Project Big Stone**: One of the largest battery storage systems in the world, deployed in under 12 months for POET, the world’s largest biofuels producer. It delivers affordable, reliable energy and serves as a proof-of-concept for the company’s giga-scale deployment model.

## Market Standing
- **Valuation/Market Cap**: Not publicly available.
- **Key Metric**: Total funding of **$220.0M** across 10 rounds, including a $150M Series B led by Decarbonization Partners (Feb 2024). Annual revenue estimated at **$7.7M**.
- **Notable Investors/Partners**: Decarbonization Partners, National Science Foundation, California Energy Commission. Key partner: POET (biofuels).
- **Growth Signals**: 197 employees (+36.6% YoY), 31,700 LinkedIn followers (+42.9% YoY), active job postings up 140% YoY. The company is building gigawatt-hours of thermal batteries annually at its U.S. factory and has a presence in Spain.

## Competitive Advantages
- **Proprietary Technology**: Uses solid carbon thermal storage—a simple, safe, and low-cost material—to provide both heat and power, differentiating from chemical battery or molten salt solutions.
- **Modular & Factory-Built**: Modules are manufactured in a U.S. factory, enabling rapid deployment, seamless integration, and operational redundancy at any scale.
- **Speed to Market**: Project Big Stone advanced from an empty lot to energy delivery in under 12 months, demonstrating a fast deployment model that can be replicated globally.
- **Multi-day Storage**: Provides reliable energy for industrial operations where downtime is not an option, solving the intermittency problem of renewables.

## Strategic Focus
- **Scale and Replicate**: Replicating the Project Big Stone model at factories and data centers across the U.S. and globally.
- **Giga-scale Manufacturing**: Expanding factory capacity to produce gigawatt-hours of thermal batteries each year, with a focus on American manufacturing.
- **Market Expansion**: Targeting hard-to-abate industrial sectors (steel, cement, chemicals) and data centers, while expanding internationally (e.g., Spain).
- **Cost Leadership**: Driving down costs to make cheap, clean energy the standard for global industry.

## Why Work Here
- **Mission-Driven Work**: The company’s north star is to power global industry with clean energy, offering employees a chance to work on one of the most urgent climate challenges.
- **Culture**: Values include “Build with Humility & Openness,” “Team & Mission First,” and “Joy & Laughter Connect Us.” The company emphasizes kindness, collaboration, and learning from setbacks.
- **Work Environment**: Hybrid/remote-friendly with “Home Week” each quarter to bring in-person and remote team members together. Offices in San Jose, CA; Big Stone City, SD; and remote roles in the U.S.
- **Benefits**: Competitive salary, stock options, 401k match, 16 weeks paid parental leave, comprehensive medical/vision/dental, HSA with employer contribution, subsidized backup childcare/senior care/petcare, mental health support, on-site gym, healthy snacks, and volunteer time off.
- **Engineering & Impact**: Teams work on cutting-edge thermal storage, manufacturing, and field engineering. The company is growing fast (36% headcount growth) and offers the chance to shape a new industry.

## Sources
1. [antora.com](https://www.antora.com/)
2. [antora.com/company](https://www.antora.com/company)
3. [antora.com/careers](https://www.antora.com/careers)
4. [linkedin.com/company/antora-energy](https://www.linkedin.com/company/antora-energy)
5. [cbinsights.com/company/antora-energy](https://www.cbinsights.com/company/antora-energy)

## Other roles at Antora Energy

- [Strategic Communications Manager](https://feeny.ai/job/strategic-communications-manager-antora-energy-san-jose-wfsp6ek2yt29) — San Jose, CA
- [Technical Program Manager](https://feeny.ai/job/technical-program-manager-antora-energy-san-jose-n7ak42zt0k1a) — San Jose, CA
- [Senior Manufacturing Engineer](https://feeny.ai/job/senior-manufacturing-engineer-antora-energy-san-jose-ccbxzg2hs4m2) — San Jose, CA
- [Senior Mechanical Engineer - Thermophotovoltaic Hardware & Manufacturing](https://feeny.ai/job/senior-mechanical-engineer-thermophotovoltaic-hardware-manufacturing-antora-24yw9z12n42z) — San Jose, CA
- [HR & Site Administrator](https://feeny.ai/job/hr-site-administrator-antora-energy-pratt-y2pctnqz7cak) — Pratt, KS
- [Plant Technician](https://feeny.ai/job/plant-technician-antora-energy-pratt-mc4nqsj5jrrg) — Pratt, KS
- [Sr. Project Manager, Interconnection Projects & Grid Infrastructure Delivery](https://feeny.ai/job/sr-project-manager-interconnection-projects-grid-infrastructure-delivery-antora-bzsbfgwk042d) — United States
- [Contracts Manager/Paralegal](https://feeny.ai/job/contracts-manager-paralegal-antora-energy-san-jose-7j305hmwzs4g) — San Jose, CA
- [Senior Project Engineer](https://feeny.ai/job/senior-project-engineer-antora-energy-san-jose-xy8weapbkxvp) — San Jose, CA
- [Recruiting Operations Coordinator (Contract)](https://feeny.ai/job/recruiting-operations-coordinator-contract-antora-energy-san-jose-vakc0y0ynn78) — San Jose, CA