Ops & Admin Assistant — Startup Office Support (Seattle)

Mafix; Seattle (WA); On-site; USD 28,000 - 39,000; Part time

Job summary

Mafix is seeking a reliable, resourceful Administrative Assistant to support day-to-day operations for a small, fast-moving team in Seattle. This part-time, in-person role covers office and lab logistics, procurement, and bookkeeping tasks to keep operations running smoothly.

You will log shipments, coordinate with vendors, schedule meetings, and assist with onboarding. The position reports to the CEO and offers flexible hours within a 15–20 hour week schedule.

Qualifications

• 2+ years of administrative, operations, or office coordination experience, ideally in a startup, lab, or small-business setting.
• Highly organized and self-directed, with strong attention to detail and follow-through.
• Comfortable juggling varied tasks and shifting priorities.
• Proficient with common office and productivity tools (email, calendars, spreadsheets, document sharing).

Responsibilities

• Manage office and lab logistics: order supplies and equipment, receive and log shipments, and coordinate with vendors.
• Support facilities upkeep and coordinate with building management and service providers.
• Assist with bookkeeping tasks such as expense tracking, invoice processing, and receipt organization.
• Help schedule meetings, coordinate travel, and support team onboarding.
• Keep records, files, and shared systems organized and up to date.
• Pitch in wherever needed to keep a growing team running efficiently.

Skills

Administrative experience

Organized / detail-oriented

Independent work

Time management

Adaptability

Tools

Email tools

Calendars

Spreadsheets

Document sharing

Job description

Mafix is seeking a reliable, resourceful Administrative Assistant to support day-to-day operations for a small, fast-moving team in Seattle. This part-time, in-person role covers office and lab logistics, procurement, and bookkeeping tasks to keep operations running smoothly.

You will log shipments, coordinate with vendors, schedule meetings, and assist with onboarding. The position reports to the CEO and offers flexible hours within a 15–20 hour week schedule.