Executive Assistant & Office Manager

About the role

Syenta is looking for a high‑ownership Executive Assistant & Office Manager to support the CEO and CTO across multiple time zones and to run the Sydney office as the company expands into a new facility.

Key responsibilities

• Own and manage the CEO’s and CTO’s calendars, coordinate meetings across Australia, the US, Asia and Europe, and protect focus time.
• Plan and book domestic and international travel, handling itineraries, accommodations and last‑minute changes.
• Support the Chief of Staff on strategic and cross‑functional initiatives.
• Maintain a welcoming, well‑run workplace: tidy meeting rooms, stocked kitchen, plant care, and smooth facility operations.
• Manage building and vendor relationships, warranty claims, repairs, and site security (keycards, access control, alarms).
• Coordinate onboarding logistics, including keycards, device setup and software access.
• Administer software tools, user accounts, licences and subscriptions.
• Organise team events, celebrations and communications such as newsletters and presentations.
• Oversee company card, expense processing and weekly transaction reconciliation.

Required profile

• High ownership mindset – proactively solves problems and follows through without being asked.
• Exceptional organisational ability to juggle multiple executives and office tasks.
• Hands‑on, low‑ego attitude – comfortable handling travel arrangements or fixing a coffee machine.
• Sound judgement and discretion with confidential information.
• Clear written communication skills for internal and external audiences.
• Fast learner who quickly adopts new tools and processes.

Required skills

• Strong calendar and travel management experience.
• Facility and vendor management capabilities.
• Proficiency with office software tools, user account administration and expense systems.

What we offer

• Salary range $70,000 – $90,000 plus 12% superannuation.
• Early‑stage equity opportunities.
• Flexible leave policies and strong work‑life balance.
• Professional growth in a fast‑growing deep‑tech startup.
• Team events and collaborative culture with company‑wide gatherings in Australia.