Monarch Quantum

Designs and manufactures quantum photonic subsystems

Senior Planner Buyer

Production Planning & Scheduling +1Confirmed live in the last 24 hours

Full-timeSan Diego, CA, USA

About the Job

Requirements

A bachelor's degree in Supply Chain, Engineering, Business, or a related field, or equivalent experience.
Five to eight years of experience in production planning, procurement, or planner/buyer roles.
Experience supporting new product introduction or low-volume, high-mix manufacturing environments.
Ability to read and interpret technical drawings and specifications.
Strong enterprise resource planning and material requirements planning system experience, with advanced Excel skills.
Familiarity with demand planning, material requirements planning logic, and inventory control principles.
Understanding of supplier negotiations, requests for quotation, and basic contract terms.
Strong organizational skills and the ability to manage multiple priorities in a dynamic environment.
Employment is contingent upon being a U.S. person as defined by 8 U.S.C. § 1324b(a)(3), because the position requires access to export-controlled information.
Comfort with ambiguity and change and willingness to take on varied responsibilities.

Responsibilities

Develop and maintain material requirements plans to support engineering builds, prototype development, and low-rate production.
Partner with Engineering to manage bills of materials releases, revisions, and engineering change orders.
Execute procurement against the Master Production Schedule and ensure materials align with cost, schedule, and performance objectives.
Collaborate with Engineering, Quality, Program Management, and Finance to ensure material alignment with program milestones.
Monitor and manage long-lead-time components to prevent schedule risk, and identify alternate parts or suppliers for long-lead or at-risk components.
Track and report supply chain metrics, including on-time-in-full performance, supplier lead times, purchase price variance, inventory accuracy, and material availability.
Maintain planning parameters, including lead times, safety stock, and order policies, within the enterprise resource planning system.
Identify, qualify, and manage suppliers capable of meeting technical specifications and quality requirements.
Lead requests for quotation, perform cost analysis, and negotiate pricing, terms, and delivery schedules.
Establish and manage supplier relationships to ensure on-time, quality performance.

Desired Qualifications

Experience in high-tech hardware sectors such as photonics, electronics, aerospace, or precision manufacturing.
Working knowledge of ISO 9001 or AS9100 environments.

Senior Planner Buyer

Monarch Quantum · San Diego, United States · Full-time · Posted 2026-10-30

Salary: USD 90,000–120,000

Workplace: on_site

Department: Corporate

Description

Join our dynamic team as a Senior Planner/Buyer. You'll play a key role in building our foundation, working with cutting-edge technologies, and supporting new product development. This position is ideal for a self-starter who thrives in a fast-paced, engineering-driven environment and enjoys working closely with technical teams to ensure material readiness for complex products. You will execute planning and procurement activities that support rapid product iteration, evolving Bills of Materials (BOMs), and demanding technical requirements. This role is an experienced individual contributor position with significant cross-functional exposure. Your key responsibilities are as follows:

Develop and maintain material requirements plans (MRP) to support engineering builds, prototype development, and low-rate production. Partner closely with Engineering to manage BOM releases, revisions, and Engineering Change Orders (ECOs).
Execute procurement against the Master Production Schedule (MPS) and ensure materials are aligned to cost, schedule, and performance objectives. Collaborate with Engineering, Quality, Program Management, and Finance to ensure material alignment with program milestones.
Monitor and manage long-lead-time components to prevent schedule risk. Proactively identify alternate parts or suppliers for long-lead or at-risk components.
Track and report key supply chain metrics, including OTIF, supplier lead times, purchase price variance (PPV), inventory accuracy, and material availability.
Maintain accurate planning parameters (lead times, safety stock, order policies) within the ERP system.
Identify, qualify, and manage suppliers capable of meeting technical specifications and quality requirements.
Lead RFQs, perform cost analysis, and negotiate pricing, terms, and delivery schedules.
Establish and manage supplier relationships to ensure on-time, quality performance.

Requirements

This position requires access to export-controlled information. Employment is contingent upon the applicant being a U.S. person as defined by 8 U.S.C. § 1324b(a)(3).

Experience:

Bachelor’s degree in Supply Chain, Engineering, Business, or related field; or equivalent experience.
5–8 years of experience in production planning, procurement, or planner/buyer roles.
Experience supporting new product introduction (NPI) or low-volume, high-mix manufacturing environments.
Experience in high-tech hardware sectors such as photonics, electronics, aerospace, or precision manufacturing preferred.

Skills:

Ability to read and interpret technical drawings and specifications.
Strong ERP/MRP system experience; advanced Excel skills required.
Familiarity with demand planning, MRP logic, and inventory control principles.
Understanding of supplier negotiations, RFQs, and basic contract terms.
Working knowledge of ISO9001 or AS9100 environments preferred.
Strong organizational skills with the ability to manage multiple priorities in a dynamic environment.

Startup Mindset:

You're creative, flexible, and eager to wear multiple hats.
You're passionate about building systems from the ground up and comfortable with ambiguity and change.

Benefits

The expected annual salary range for this position is $90,000-$120,000 (commensurate with experience).

As a full-time employee, you will be eligible for Monarch’s comprehensive benefits package, which includes:

Medical, Dental, and Vision insurance
Fidelity 401(k) plan with 4% employer matching
20 paid time off (PTO) days per year
13 paid company holidays
9/80 work schedule (every other Friday off)

Monarch Quantum is proud to be an equal opportunity employer and does not discriminate on the basis of race, color, citizenship status, national origin, ancestry, sex, sexual orientation, age, religion, creed, physical or mental disability, medical condition, marital status, veteran status or any other characteristics protected under applicable federal, state and local laws.

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About the Company

Monarch Quantum

Designs and manufactures quantum photonic subsystems

Monarch Quantum designs and manufactures Quantum Light Engines, integrated photonic subsystems that replace large laser systems with compact, factory-aligned modules. These modules handle state preparation, cooling, trapping, manipulation, and coherent control to prepare and measure quantum states for computing, sensing, and communications. They operate with a vertically integrated model in San Diego, combining in-house systems engineering, hybrid optical packaging, robotic assembly, and AI-driven manufacturing to enable design-to-volume production under one roof, reducing size, complexity, and integration risk. The company differentiates itself by offering ready-to-integrate modular photonic subsystems for architectures such as trapped-ion, neutral-atom, and photonics-based platforms, targeting hardware developers, system integrators, and OEMs to streamline quantum hardware development and scaling.

Company size: 51-200
Company stage: Early VC
Total funding: $55M
Headquarters: San Diego, CA
Founded: 2025

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