Sr. Executive Assistant

Keystone•Washington, DC

4d•$115,000 - $130,000

About The Position

Keystone is seeking an experienced, highly organized Senior Executive Assistant to support a senior partner who also serves as a professor at Harvard Business School, with active research and teaching responsibilities. This high-touch role requires exceptional judgment, discretion, responsiveness, and attention to detail. The assistant will manage a high-volume calendar and substantial travel across client, academic, research, teaching, and other professional commitments, coordinating across Keystone and HBS while navigating competing priorities and changing schedules. The role includes complex calendar and inbox management, stakeholder communications, meeting preparation and follow-through, support for strategic initiatives, and broad administrative coordination. The Senior Executive Assistant will plan domestic and international travel, process expenses, maintain records, prepare client-ready materials, coordinate onboarding logistics, and handle confidential personnel, client, and financial information with complete discretion. The position calls for a proactive, resourceful, dependable professional who can work autonomously in a complex, fast-paced environment.

Requirements

5–7 years of executive support experience, including support for senior leaders such as a Partner, C-suite executive, or equivalent, in professional services, finance, consulting, or a similarly fast-paced environment.
Demonstrated autonomy and sound judgment, including knowing when to make decisions independently and when to escalate.
Exceptional organization and attention to detail across competing priorities, with the ability to support more than one executive at once.
Excellent written communication skills, including the ability to write clearly, concisely, and professionally and draft in an executive’s voice with minimal editing.
Strong verbal communication and interpersonal skills, with the presence and poise to interact confidently with clients, senior stakeholders, and external partners.
Ability to manage up, push back diplomatically, and handle sensitive conversations tactfully.
Absolute discretion with confidential information.
Advanced proficiency in Microsoft Office, including Outlook, Word, PowerPoint, and Excel.
Comfort learning new tools quickly.

Responsibilities

Manage complex, high-volume calendars across multiple time zones, independently assessing priorities, conflicts, and trade-offs.
Protect time for deep work, travel recovery, and personal commitments, and adapt quickly when priorities change.
Serve as a trusted gatekeeper and point of contact for senior internal and external stakeholders, including clients; direct or diplomatically decline requests as appropriate.
Triage incoming requests, flag matters requiring executive attention, and independently handle other matters.
Manage executive inboxes by surfacing priorities, drafting responses, filing and archiving, and tracking time-sensitive matters.
Draft, edit, and send correspondence on behalf of executives, adapting tone and content to the audience.
Build relationships with internal and external stakeholders to provide a seamless executive experience.
Prepare meeting briefs, agendas, attendee backgrounds, and relevant context so executives are prepared.
Schedule and coordinate internal meetings, client meetings, and team events, including room bookings, catering, A/V, and virtual logistics.
Capture action items, drive follow-ups to completion, track outstanding items across both executives, and provide updates on next steps.
Coordinate timelines, workstreams, and stakeholders for new initiatives across internal teams, clients, and external expert networks.
Track deliverables and deadlines, prepare status updates, and keep executives informed of progress and risks.
Build and maintain relationships with external experts, partners, and vendors, coordinating outreach, scheduling, and logistics.
Identify and implement improvements to processes, templates, and recurring workflows.
Plan and manage domestic and international travel, including flights, hotels, itineraries, visas, ground transportation, and real-time changes.
Process expenses and reimbursements accurately and on schedule, and reconcile corporate card activity.
Manage Partners’ hours submission and timekeeping, ensuring accurate, timely entries that support client billing.
Maintain organized filing systems, contact lists, and records for easy retrieval.
Prepare, format, and proofread documents, presentations, and reports to a client-ready standard.
Coordinate onboarding logistics for new team members and liaise with office operations, IT, and finance.
Handle confidential personnel, client, and financial information with complete discretion.