Third Plateau

Administrative Assistant

• Schedule meetings and calls for Vice President and Senior Director, Democracy, provide scheduling and administrative support for two project teams, and proactively seek appropriate resources to support their work.
• Communicate effectively and professionally to both external partners and internal team members.
• Provide general project management support (e.g. meeting preparation, coordinating catering, researching venues, ordering supplies, etc.), particularly around events, meetings, and external communications.
• Take comprehensive notes and synthesize key takeaways and action items from internal and external meetings.
• Provide general project management support as needed.
• Contribute ideas for improvements to our internal systems (Airtable, Microsoft Office, Salesforce)
• Assist project teams with administrative tasks such as data entry and document management
• Assist with projects managed by project team leads
• Support project teams implementation with the firm’s knowledge management policies and procedures.
• Manage logistics around virtual event invitations/registration, including creating calendar invites, setting up Zoom lines, hosting calls, tracking attendees, and sending meeting reminders and follow up.
• Ensure project leads have the materials necessary for important stakeholder interactions.
• Edit recordings of virtual events and sharing with attendees.
• Source venues (e.g., restaurants and hotels) and vendors (e.g., audio/visual company, swag vendors, etc.) for in-person event needs.
• Plan in-person event details such as menus, room layouts, audio/visual, and hotel room reservations for attendees.
• Act as on-site coordinator and venue contact for events.
• Create event materials such as name tags, name tents, attendee lists, attendee bio books, etc.
• Tend to internal administrative items (e.g., emails/slack, timekeeping, expenses, HR).
• Participate in internal activities (i.e., full team meetings, peer learning communities, culture building activities, and regular check-ins with your supervisor).
• Engage in individual professional development/learning opportunities.

People Operations

• Oversee and process semi-monthly payroll, including onboarding, terminations, leave management, deduction changes, and generating reports.
• Troubleshoot payroll issues and ensure systems integrate effectively with finance and other providers.
• Partner with the payroll provider to manage payroll tax filings, reconciliations, and compliance with federal, state, and local regulations.
• Administer employee benefits including open enrollment, invoicing, and ad-hoc changes; coordinate open enrollment logistics and assist employees with enrollment and troubleshooting.
• Process semi-monthly 401(k) contributions accurately and on time; track eligibility and maintain data accuracy with Fidelity.
• Manage end-to-end logistics for onboarding, benefits enrollment, background checks, and 401(k) setup; partner with hiring managers to develop personalized onboarding plans.
• Lead offboarding processes, including exit interviews and feedback collection.
• Lead the annual review process by configuring and managing Lattice review modules; train staff on performance tools and support calibration during annual reviews.
• Provide day-to-day HR operational support, including email communications, timekeeping, expense management, and responding to employee questions; maintain and improve People Operations systems and SOPs.
• Engage in team-building activities, professional development, and organizational culture initiatives; participate in peer learning communities and regular check-ins with leadership.
• Address day-to-day employee concerns related to workplace issues, conflict, or performance; provide coaching to managers and employees to resolve conflicts informally.
• Manage the full-cycle recruitment process, facilitate debrief sessions, and coordinate with hiring managers to select final candidates.
• Maintain job descriptions and skill frameworks; support design and execution of development and training programs aligned with organizational goals.
• Oversee HR systems (Paylocity, Lattice, Lever, Ethena) ensuring data integrity and system optimization; drive automation and evaluate vendors.
• Generate and analyze payroll, benefits, and performance reports; build dashboards and reporting tools to monitor workforce trends.
• Administer leave programs and provide guidance on eligibility and processes; manage government filings, audits, and reporting (e.g., HCSO, OSHA, EEOC, Form 5500).

Administrative Assistant

People Operations Generalist