Administrative and technical assistant

• 27 juillet 2026
• 80 - 100%
• Temporary
• CHF 5-200 - 5-600 /month
• français (Native language)
• 1203 Genève

Our client, an environmental consulting firm, is looking for an Administrative and Technical Assistant for a fixed-term temporary mission.

Reporting to the management, you will ensure the administrative, financial, and organizational coordination of the office's mandates, while providing support to project managers in the monitoring of their activities.

Your missions

Administration and office management

Telephone reception and physical reception of visitors

Management of mail, orders, and supplies

Updating internal databases

Management of vehicles, equipment, and common areas

Administrative control of invoices and expense reports.

Opening and monitoring of mandates

Verification of input data (contracts, signed offers, conditions, etc.)

Creation and monitoring of projects in the internal system

Management of amendments and updating of contractual information.

Invoicing and financial monitoring

Preparation and issuance of invoices

Internal follow-ups to ensure complete and timely invoicing

Development and updating of financial dashboards (costs, hours, margins)

Monitoring of planning and forecasted workload

Updating of mandate schedules.

Administrative support and coordination

Administrative support to project managers in documentary monitoring

Interface between management, accounting, and technical teams.

Profile sought

This position requires a versatile, autonomous, and rigorous person, endowed with an excellent sense of organization and benefiting from experience in the construction sector. You are able to manage several files in parallel, prioritize your tasks, and collaborate effectively with different interlocutors. Good mastery of IT tools as well as an interest in technical environments constitute assets.