---
title: 'System Modeling and Simulation Lead (Quantum Systems) at PsiQuantum'
canonical: 'https://feeny.ai/job/system-modeling-and-simulation-lead-quantum-systems-psiquantum-milpitas-ctz9e29tw1zc'
type: 'job'
last_seen: '2026-10-12'
---

# System Modeling and Simulation Lead (Quantum Systems) at PsiQuantum

- **Company:** PsiQuantum
- **Location:** Milpitas California, United States
- **Compensation:** $146k–$245k
- **Posted:** 2026-10-08
- **Last confirmed live:** 2026-10-12
- **Apply:** https://www.psiquantum.com/apply?gh_jid=8016292003

## Job description

PsiQuantum's mission is to build the first useful quantum computers: machines capable of delivering the breakthroughs the field has long promised. Since our founding in 2016, our singular focus has been to build and deploy million-qubit, fault-tolerant quantum systems.

Quantum computers harness the laws of quantum mechanics to solve problems that even the most advanced supercomputers or AI systems will never reach. Their impact will span energy, pharmaceuticals, finance, agriculture, transportation, materials, and other foundational industries.

Our architecture and approach is based on silicon photonics. By leveraging the advanced semiconductor manufacturing industry, including partners like GlobalFoundries, we use the same high-volume processes that already produce billions of chips for telecom and consumer electronics. Photonics offers natural advantages for scale: photons don't feel heat, are immune to electromagnetic interference, and integrate with existing cryogenic cooling and standard fiber-optic infrastructure.

That approach has since been tested at the highest level of scrutiny the U.S. government applies to emerging technology, and it has held up. In 2025, PsiQuantum closed a $1 billion funding round that valued the company at $7 billion. In 2026, the U.S. Department of Commerce signed a $100 million Letter of Intent under the CHIPS and Science Act, followed by a $125 million agreement with DARPA under Stage C of its Quantum Benchmarking Initiative, PsiQuantum's most valuable U.S. government agreement to date. This year, we also broke ground on our utility-scale quantum computer in Brisbane, Australia, and continued building out our Chicago site. Victor Peng, our CEO, and co-founder Jeremy O'Brien, now Executive Chairman, lead a team and board that reflects how seriously the world is taking this build, joined this year by Intel's Lip-Bu Tan and Atomico's Niklas Zennström.

PsiQuantum also develops the algorithms and software needed to make these systems commercially valuable. Our application, software, and industry teams work directly with leading Fortune 500 companies, including Airbus, Lockheed Martin, Mercedes-Benz, Boehringer Ingelheim, and Mitsubishi Chemical, to prepare quantum solutions for real-world impact.

Quantum computing is not an extension of classical computing. It represents a fundamental shift, and a path to mastering challenges that cannot be solved any other way. The potential is enormous, and we now have the funding, the government validation, and the sites under construction to make it real.

Job Summary:

We're looking for a System Modeling and Simulation Lead to build predictive, system-level models of our quantum computer based on photonic, electronic, and other system descriptions together with measured or specified component performance. The models will translate losses, noise, timing jitter, stability, crosstalk, false-count rates, and related nonidealities into key quantum performance metrics. This role will also create validated subsystem abstractions that conceal unnecessary implementation detail while preserving the behavior and control knobs needed by validation, architecture, and design teams for predictive analysis and model closure. These capabilities must be delivered through user-friendly, well-documented interfaces so teams across the organization can configure, run, and interpret approved models without needing to understand their internal implementation.

Responsibilities:

- Build predictive system-level quantum performance models
- Ingest and interpret photonic, electronic, and mixed-domain system descriptions, component models, characterization data, and system configuration inputs.
- Translate component and interface performance - including loss, noise, jitter, drift and stability, crosstalk, and false-count rates - into end-to-end predictions of key quantum system metrics.
- Develop models that support architecture trades, requirement allocation, performance budgeting, and design decisions before full hardware is available.
- Develop coherent, reusable system abstractions
- Create reduced-order or behavioral models that connect logical intent to physical-system behavior and support control, calibration, and validation workflows, while masking lower-level implementation details that are not needed by model users.
- Define stable model interfaces and expose the necessary inputs, outputs, states, uncertainties, and control knobs for architecture, validation, and design teams, as well as control and calibration workflows.
- Establish clear validity ranges, assumptions, parameter provenance, and fidelity levels, and maintain coherence among logical, physical, and control models as each evolves.
- Drive model validation and closure
- Partner with validation, design, and subsystem teams to compare model predictions against component, subsystem, and integrated-system measurements.
- Quantify prediction error and uncertainty using sensitivity analysis, Monte Carlo methods, uncertainty propagation, and statistical inference where appropriate.
- Investigate model-to-hardware discrepancies, identify missing physics or incorrect assumptions, and drive model closure with documented evidence.
- Build usable simulation capabilities that scale
- Develop maintainable, modular simulation software in Python, with automated tests, version control, clear APIs, and reproducible execution.
- Provide a user-friendly interface - such as documented Python APIs, configuration-driven workflows, command-line or graphical tools, templates, and clear visualization/reporting - so users across the organization can configure and run approved analyses with minimal support.
- Create versioned component and subsystem model libraries that remain synchronized with requirements, characterization data, system configurations, and hardware revisions, while improving execution efficiency without compromising accuracy or traceability.
- Create a workflow that enables other engineers and domain experts to contribute component, subsystem, and detailed-physics models while maintaining common interfaces, review rigor, traceability, and quality standards.
- Partner cross-functionally and communicate clearly
- Work closely with architecture, validation, design, photonics, electronics, controls, calibration, detailed physics modeling, and systems engineering teams to define model needs, boundaries, and interfaces.
- Turn ambiguous performance questions into well-scoped modeling studies with clear assumptions, confidence bounds, and decision-relevant outputs.
- Communicate model behavior, limitations, dominant sensitivities, and recommended actions through clear documentation and concise technical and executive updates.

Experience/Qualifications:

- Education & experience
- MS in Systems Engineering, Applied Mathematics, Physics, Applied Physics, Electrical Engineering, Computer Engineering, or a related field with 10+ years of relevant industry experience, or
- PhD in a similar field with 6+ years of relevant industry experience.
- Systems-modeling and signal-processing background
- Strong foundation in systems modeling for complex, multi-domain physical systems, with the ability to connect component behavior and physical nonidealities to system-level performance metrics.
- Strong understanding of signal processing, noise analysis, timing and frequency-domain behavior, stochastic processes, and statistical data analysis.
- Modeling & software
- Advanced proficiency in Python scientific computing and experience building production-quality simulation or analysis software that is usable by engineers beyond the development team.
- Demonstrated experience with graph-based system representations, numerical simulation, and model validation for complex physical systems.
- Experience using and championing modern agentic software-development best practices.
- Proficiency with modern version-control tools and collaborative workflows, particularly Git, including branching, code review, and managing contributions from multiple developers.
- Collaboration & communication
- Exceptional written and verbal communication skills; able to explain model assumptions, uncertainty, limitations, and technical conclusions to both domain experts and system-level decision makers.
- Mindset
- Rigorous and intellectually curious; comfortable working across abstraction levels, challenging assumptions, and iterating as designs and measured data evolve.

PsiQuantum provides equal employment opportunity for all applicants and employees. PsiQuantum does not unlawfully discriminate on the basis of race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), gender identity, gender expression, national origin, ancestry, citizenship, age, physical or mental disability, military or veteran status, marital status, domestic partner status, sexual orientation, genetic information, or any other basis protected by applicable laws.

Note: PsiQuantum will only reach out to you using an official PsiQuantum email address and will never ask you for bank account information as part of the interview process. Please report any suspicious activity to recruiting@psiquantum.com.

We are not accepting unsolicited resumes from employment agencies. Base pay is one part of the total compensation package. Full-time roles are eligible for equity and benefits. Our compensation ranges reflect the cost of labor across multiple U.S. geographic markets, and we pay based on defined geographic zones. This position may be filled within one of the following U.S. geographic zones, each with its own salary range.

Actual compensation may vary outside of these ranges and is dependent on various factors including, but not limited to, a candidate's qualifications, relevant education and training, competencies, experience, geographic location, business needs, and internal equity. Your recruiter can share more details about the salary range applicable to your location during the hiring process.

- Zone 1 - Bay Area and NYC
- Zone 2 - Examples include Los Angeles and Washington DC
- Zone 3 - Examples include Austin, Chicago, and Sacramento
- Zone 4 - Examples include Nashville and Phoenix/Tempe and many remote locations

This position includes the following benefits: competitive health coverage for you and your dependents, 401(k) with company match, equity grants, access to financial wellness tools and planning resources, wellness benefits, family support programs, life and disability insurance, paid leave programs, company-designated paid holidays, discretionary time off (DTO), and an end-of-year company shutdown. Some of these benefits have eligibility requirements and may vary based on location, role, or employment status. Many of these benefits are subsidized or fully paid for by the company.

The estimated annual base salary range for this role is:

Zone 1 $208,300—$244,700 USD

Zone 2 $187,400—$220,200 USD

Zone 3 $166,600—$195,800 USD

Zone 4 $145,800—$171,300 USD

## About PsiQuantum

## Company Overview
- **One-liner**: PsiQuantum is building and deploying the world’s first utility-scale, fault-tolerant quantum computers using a photonic approach and commercial semiconductor manufacturing.
- **Entity Type**: Private (Series E)
- **Headquarters**: Palo Alto, California, USA
- **Founded**: 2016
- **Founders**: Prof. Jeremy O’Brien, Prof. Terry Rudolph, Dr. Pete Shadbolt, Prof. Mark Thompson

## Core Business
- **Primary industry**: Quantum Computing
- **Target customers**: Enterprises, governments, and researchers in energy, materials, pharmaceuticals, finance, and national security sectors
- **Mission**: To build and deploy useful, fault-tolerant quantum computers that can solve previously intractable problems.

## Products & Services
- **[Omega Chipset]**: A silicon photonic chipset, manufactured at scale at GlobalFoundries’ Fab 8 (Malta, NY), integrating all photonic components (superconducting detectors, single photon sources, optical switches) for fault-tolerant quantum computing.
- **[Construct Platform]**: A free, open-access software platform launched in May 2026 for designing quantum circuits, writing and simulating fault-tolerant quantum algorithms, and optimizing resources. Supports visual circuit design and Python-based tools.
- **[Utility-Scale Quantum Computers]**: Modular, fault-tolerant quantum computers being built at two sites — Moreton Bay Central, Queensland, Australia (ground broken June 2026) and the Illinois Quantum and Microelectronics Park (IQMP) in Chicago, USA.

## Market Standing
- **Valuation/Total Funding**: Not publicly disclosed, but the company raised a **$1 billion Series E** financing round in 2025. It also signed a **$100 million Letter of Intent** with the U.S. Department of Commerce under the CHIPS and Science Act (May 2026).
- **Key Metric**: **500+ employees** (as of 2026)
- **Notable Investors/Partners**:
  - U.S. Department of Commerce (CHIPS Act incentives)
  - DARPA (advanced to final phase of US2QC program within the Quantum Benchmarking Initiative)
  - U.S. Air Force Research Laboratory ($22.5 million contract)
  - Australian Commonwealth and Queensland governments (A$940 million investment package announced April 2024)
  - GlobalFoundries (manufacturing partner)
  - Hartree Centre (UK research partnership)
- **Growth Signals**:
  - Broke ground on the world’s first utility-scale quantum computer site in Australia (June 2026).
  - Opened a new Test & Validation Lab at Griffith University, Brisbane (2024-2025).
  - Launched Construct software platform to all developers (May 2026), expanding community reach.
  - Established an R&D facility at STFC Daresbury Laboratory, UK.
  - Government Advisory Board established with senior former U.S. officials.

## Competitive Advantages
- **Photonic Approach**: Uses photons (light) as qubits, which do not feel heat or electromagnetic interference. This allows control electronics to be colocated close to the qubit, reducing system size and cost.
- **Semiconductor Leverage**: Manufactures chips at a commercial, high-volume foundry (GlobalFoundries), leveraging trillions of dollars of existing infrastructure — a stark contrast to the custom cleanroom approach of most quantum startups.
- **Modular & Fiber-Based Scaling**: Uses standard telecom optical fiber to network chips, solving the inter-chip connection challenge with ultra-low-loss (reduced from ~50% to ~1%), enabling error-correction-compatible scaling.
- **Government Backing**: Deep partnerships with U.S. and Australian governments, DARPA, and key national labs signal strong trust and long-term strategic alignment.

## Strategic Focus
- **Scale to Utility**: Building the world’s first utility-scale (million-qubit) fault-tolerant quantum computers and deploying them as infrastructure.
- **Geographic Expansion**: Simultaneous buildouts in Australia (Moreton Bay) and the U.S. (Chicago), with R&D in the UK.
- **Ecosystem Development**: Growing the developer community through the free Construct platform to build applications and algorithms before the hardware is fully online.
- **Technology Stack Integration**: Continuous improvement of the Omega chipset, cryogenic cabinets, networking, and control systems as an integrated platform.

## Why Work Here
- **Groundbreaking Mission**: Opportunity to work on one of the hardest engineering challenges of our time — building useful quantum computers that could reshape energy, materials, pharma, and national security.
- **Career Impact**: Be part of a team scaling from “lab to fab” with a strong track record of meeting DARPA milestones and government contracts. The company is moving from R&D into construction and deployment.
- **Flexible Work Policy**: Offers in-office, hybrid, and remote options depending on team and location.
- **Benefits**:
  - Competitive health, dental, and vision coverage for employees and dependents
  - 401(k) with company match, equity grants, financial wellness tools
  - Generous parental leave policy
  - Discretionary Time Off (DTO) plus federal holidays and end-of-year company shutdown
  - $200 quarterly health reimbursement
  - 12 therapy + 6 coaching sessions with Modern Health
  - Annual membership to Care.com
- **Locations**: Palo Alto (HQ, CA), Brisbane (QLD, Aus), Chicago (IL), Daresbury (UK), Malta (NY). Global team with multiple R&D and manufacturing hubs.

## Sources
1. [PsiQuantum Official Site](https://www.psiquantum.com/)
2. [PsiQuantum About Page](https://www.psiquantum.com/about)
3. [PsiQuantum Careers Page](https://www.psiquantum.com/careers)
4. [PsiQuantum Technology Page](https://www.psiquantum.com/technology)
5. [Wikipedia - PsiQuantum](https://en.wikipedia.org/wiki/PsiQuantum)

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