Senior Planner Buyer

Monarch Quantum; San Diego (CA); On-site; USD 90,000 - 120,000; Full time

Benefits offered by this job

Medical insurance

Dental insurance

Vision insurance

401(k) with 4% match

20 PTO days per year

13 holidays

Job summary

Monarch Quantum is seeking a Senior Planner/Buyer in San Diego to build the supply chain foundation for our engineering-heavy products. You will drive material plans, manage MRP, and lead supplier negotiations with cross-functional teams in a fast-paced, high-tech environment.

Ideal candidates have 5–8 years in planning/procurement, strong ERP/MRP and Excel skills, and experience with BOM changes and ECOs. On-site role with competitive benefits.

Qualifications

• Bachelors degree or equivalent experience in supply chain or engineering fields.
• 5–8 years in production planning, procurement, or planner/buyer roles.
• Experience supporting NPI or low-volume, high-mix manufacturing environments.
• Experience in high-tech hardware sectors preferred.

Responsibilities

• Develop and maintain material requirements plans to support engineering builds.
• Execute procurement against the Master Production Schedule and align with milestones.
• Manage long-lead-time components and identify alternate parts or suppliers.
• Track OTIF, supplier lead times, PPV, and inventory availability.
• Maintain planning parameters within the ERP system.
• Identify, qualify, and manage suppliers meeting specs and quality.
• Lead RFQs, cost analysis, and negotiate pricing and delivery terms.
• Establish and manage supplier relationships for on-time performance.

Skills

Reading drawings

ERP/MRP experience

Advanced Excel

Demand planning

RFQs

ISO9001/AS9100 familiarity

Multitasking

Education

Bachelor's degree

Tools

ERP software

Job description

Responsibilities

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).

• 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.