Senior Planner Buyer

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

Benefits offered by this job

Medical, Dental, and Vision insurance

401(k) plan with 4% matching

20 PTO days per year

13 paid holidays

Job summary

Monarch Quantum in San Diego seeks a Senior Planner/Buyer to drive material readiness for complex products, manage MRP, BOM releases, and ECOs, and collaborate with engineering teams in a fast-paced, technically focused environment.

You will lead procurement against the Master Production Schedule, monitor long‑lead components, conduct RFQs and cost analyses, negotiate terms, and build strong supplier relationships to ensure on-time, quality performance.

Qualifications

• 5–8 years in production planning, procurement or planner/buyer roles.
• Experience supporting NPI or low-volume, high-mix manufacturing.
• Experience in high-tech hardware sectors preferred.

Responsibilities

• Develop and maintain material requirements plans to support engineering builds, prototype development, and low-rate production; manage BOM releases, revisions, and ECOs.
• Execute procurement against the Master Production Schedule to align to cost, schedule and performance objectives; collaborate with Engineering, Quality, Program Management and Finance.
• Monitor long-lead-time components to prevent schedule risk; identify alternate parts or suppliers.
• Track and report OTIF, lead times, PPV, inventory accuracy and material availability.
• Maintain planning parameters (lead times, safety stock, order policies) in the ERP system.
• Identify, qualify and manage suppliers meeting technical specs 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.

Skills

MRP planning

ERP systems

Advanced Excel

Demand planning

Inventory control

Supplier negotiations

RFQs

ISO9001/AS9100

Technical drawings

Organizational skills

Education

Bachelor's degree in Supply Chain, Engineering, or related field

Job 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.

• 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.

The expected annual salary range for this position is $90,000-$120,000 (commensuratewith 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.