Executive Assistant

Multiplier; San Francisco (CA); Remote; USD 45,000 - 62,000; Part time

Job summary

Mosaic seeks an Executive Assistant to support the CEO and leadership team. This part-time, fully remote role offers 10 hours per week and a competitive hourly rate. You will manage calendars, coordinate travel, prepare materials, and handle project tracking with discretion and professionalism.

Ideal candidates are highly organized, communicate well, and operate independently with minimal supervision from CST time zones. Prior Mosaic experience is preferred.

Qualifications

• Highly organized with strong attention to detail.
• Excellent communication and discretion.
• Comfortable using SharePoint, Zoom, Slack, and Asana.
• Able to work independently and remotely with minimal supervision.
• High emotional intelligence and accountability.

Responsibilities

• Manage the CEO's calendar and schedule internal/external meetings.
• Coordinate meeting logistics (Zoom links, agendas, reminders).
• Book travel including flight, lodging, and conference registrations.
• Prepare agendas, pull documents, and organize pre-reads; track action items.
• Maintain simple project trackers and data in Salesforce; manage documents.

Skills

Highly organized

Excellent communication

Discretion & confidentiality

Strong collaboration

Tools

SharePoint

Zoom

Slack

Asana

Job description

Executive Assistant

Department: Mosaic

Employment Type: Permanent - Part Time

Location: Remote

Compensation: $33.00 - $45.00 / hour

Description

About the Organization:

Mosaic is a national collaborative funder and field catalyst that boosts the collective power of climate, conservation, and environmental health and justice movements in the United States to achieve durable, population-scale wins. Directed by a Leadership Council of diverse and representative grassroots, NGO, and philanthropic leaders from across the country, Mosaic bolsters four key pillars of infrastructure necessary for transformative movements: Strong and resilient networks and coalitions rooted in trust; a deep bench of diverse, highly skilled leaders; advocacy tools and training for large-scale mobilization; and powerful, norm-shifting narratives. Mosaic has committed $32M in grant funding since 2020 to support collaborative projects and coordinated resources that are strengthening alliances, driving policy wins, shifting narratives, and galvanizing large-scale action.

Impact is at the heart of Mosaic’s mission. As one of the only national collaborative funds exclusively focused on building movement infrastructure – the connections and shared resources all movements need – Mosaic is committed to building the power necessary for lasting environmental and social change. A stable climate, clean air and water, healthy communities, and thriving natural systems all hang in the balance during this critical decade. Mosaic was created in response to a collective recognition that, although the U.S. environmental movement has achieved historic victories, the pace and scale of the challenge we face demand even more. The environmental movement will only achieve climate and environmental goals with a stronger, better-connected movement that is capable of driving and sustaining meaningful change.

Position Summary:

The Executive Assistant provides administrative and project coordination support to Mosaic’s Chief Executive Officer (CEO) and leadership team. This role ensures smooth day-to-day operations through proactive calendar and meeting management, travel coordination, meeting preparation and follow-up, project tracking, and general administrative support.

This is a part-time position at 10 hours per week.

Primary Responsibilities

Calendar & Scheduling Support

• Manage and optimize the CEO's calendar.
• Schedule internal/external meetings, including Leadership Council and Steering Committee sessions.
• Coordinate meeting logistics (Zoom links, agendas, reminders).
• Protect focus time and proactively resolve scheduling conflicts.
• Schedule full team meetings.
• Manage CEO’s Zoom Scheduler, ensuring up to date.

Travel Support

• Book travel including flight and lodging, ensuring all details are reflected in the calendar.
• Book conference registration.

Meeting Preparation & Follow-Up

• Conduct some light research ahead of meetings to support successful engagement, at direction of Director of Strategic Partnerships
• Prepare agendas, pull relevant documents, and organize pre-reads.
• Track and manage action items and follow ups from meetings, with clear next steps, assignments to staff, and deadlines

Project Coordination

• Maintain simple project trackers (e.g., recruitment for funder seats, Admin tasks and prioritization).
• Maintain Asana: Support deadline reminders and status updates, track tasks.
• Handle light data entry (e.g., contact lists, meeting rosters, meeting notes) in Salesforce
• Manage digital documents and folders.
• Assist in maintaining version control of key documents. Assist Operations Manager with vendor forms, reimbursements, or basic document formatting.
• Code credit card expenses or reimbursements: gather receipts, enter expenses information into expense manager, submit for approval.

The Ideal Candidate

You are a highly organized, proactive, and detail-oriented professional with excellent communication skills and sound judgment. You anticipate needs, manage competing priorities, and provide reliable, thoughtful support to executive leadership. You are collaborative, resourceful, and adaptable, with a strong commitment to accountability, discretion, and follow-through. Above all, you bring integrity, initiative, and enthusiasm to advancing Mosaic’s mission of strengthening the environmental movement and driving lasting social and environmental change.

Specific Experience Requested

• Highly organized, excellent attention to detail.
• Strong communicator with discretion and confidentiality.
• Comfortable with SharePoint, Zoom, Slack, Asana and basic project tools.
• Able to work independently and remotely with minimal supervision.
• High emotional intelligence.
• Availability: availability in CST at least 2-3 days a week between Mon – Thurs; no travel is anticipated for this role
• Prior experience working with Mosaic required.

Workplace, Compensation & Application

Workplace & Travel: This role is fully remote.

Compensation: The pay for this role is $33 - $45 per hour.

Multiplier is committed to creating an inclusive, equitable, and accessible application process for all candidates. We recognize that the traditional hiring process can create barriers. If we can support your participation in the job application or interview process by providing specific assistance or accommodation, please reach out to [e-mail]. Requests for accommodations are confidential and will not impact your candidacy.