Part-Time Lab Operations Technician (Weighing, Stock Solutions & Receiving) — Automated Lab (Night Shift Available)

onepot; South San Francisco (CA); On-site; USD 39,000 - 44,000; Part time

Job summary

onepot is seeking a part-time on-site Lab Operations Assistant in South San Francisco to support an automated workflow. You will weigh compounds precisely, prepare stock solutions, and manage receiving and inventory to keep robotics-driven processes running smoothly.

This role emphasizes accuracy, SOP adherence, and safe handling of chemicals, with night shifts available and a focus on clean records and traceable data.

Qualifications

• Strong attention to detail; comfortable following SOPs and producing clean records.
• Comfort with basic lab math (molarity, dilutions) and working carefully with chemicals.
• Reliable and consistent availability for scheduled shifts (night shift ok).
• Basic computer comfort (simple inventory tools).

Responsibilities

• Weigh solid compounds/reagents accurately on analytical balances (mg to g scale).
• Prepare labeled aliquots and staging sets for automated workflows.
• Maintain clean, contamination-aware weighing practices and record keeping.
• Receive shipments, verify contents, log inventory and assign locations for retrievability.

Skills

Attention to detail

Lab math basics

Night shift availability

Inventory/documentation discipline

Tools

Inventory tools

Job description

About the Company

onepot is building an automated small-molecule lab where robotics and software drive synthesis and analysis. This role is hands-on lab operations work that directly supports an automated workflow: accurate inputs, clean inventory, and reliable receiving are what keep the automation running.

About the Role

This part-time, on-site role in South San Francisco involves hands-on lab operations work that directly supports an automated workflow. Night shift availability is welcome.

Responsibilities

Compound handling & precision weighing (primary)

• Accurately weigh solid compounds/reagents (mg to g scale) on analytical balances
• Prepare labeled aliquots and staging sets that feed automated/robotic workflows
• Maintain clean, contamination-aware weighing practices (gloves, anti-static control, clean tools)
• Record weights, lot numbers, IDs, and operator/date in a traceable format

Stock solution preparation

• Prepare stock solutions from SOPs (target molarity/concentration, dilution math, mixing)
• Label and document concentrations, solvent, date, operator, and storage conditions
• Flag solubility issues, discrepancies, or labeling/inventory mismatches

Receiving, staging & inventory (automation-ready)

• Receive shipments, verify contents vs packing slips/POs, and triage issues (damage, missing items)
• Log inventory and assign locations so materials are retrievable fast and consistently
• Put away chemicals and supplies in correct storage (ambient/fridge/freezer/flammables/corrosives)
• Stage supplies/consumables (vials, tubes, tips, labels, solvents, PPE)

General lab ops support

• Keep weighing/receiving areas organized, audit-ready, and safe
• Assist with periodic cycle counts and basic inventory cleanup
• Follow chemical hygiene and safety procedures consistently

Qualifications

• Strong attention to detail; comfortable following SOPs and producing clean records
• Comfort with basic lab math (molarity, dilutions) and working carefully with chemicals
• Reliable and consistent availability for scheduled shifts (night shift ok)
• Basic computer comfort (simple inventory tools)

Required Skills

• Prior lab assistant / lab ops / stockroom / receiving experience
• Familiarity with SDS, chemical compatibility storage, and labeling norms

Preferred Skills

• Ability to lift/move boxes up to 50 lb
• Ability to stand at a bench for extended periods

Pay range and compensation package

$28–$32/hour, depending on experience with precision weighing, stock solutions, and inventory discipline (night shift reliability pushes toward the top end).

Equal Opportunity Statement

We are committed to diversity and inclusivity in our hiring practices.