Sr. Executive Assistant

Keystone is a premier economics, technology, and strategy consulting firm built to help companies lead through transformation. As breakthrough innovations reshape industries, redefine competition and change our society, complex and highly competitive ecosystems emerge. Keystone advises technology leaders, Fortune 100 companies, their legal counsel, and governments on business, economic, litigation, and regulatory strategy in relation to these innovations and competitive eco-systems. We operate globally from offices in Boston, New York City, San Francisco, Seattle, Washington, D.C., London, Dubai, and Bengaluru.

About the Sr. Executive Assistant Role

We're seeking a Senior Executive Assistant to serve as a strategic partner to a Senior Partner and a Partner at Keystone. This is a high-trust, high-visibility role for an experienced EA who anticipates needs, exercises sound judgment, and operates with significant autonomy.

You will be the operational backbone for a Sr. Partner and other leaders whose days span client engagements, business development, expert relationships, and firm leadership. You'll protect their time, represent them with clients and colleagues, and keep a fast-moving workload organized and on track. Beyond core executive support, you'll help build and scale new initiatives, working across internal teams, clients, and external expert networks.

Key Responsibilities

Calendar Management and Gatekeeping

Own complex, high-volume calendars across multiple time zones, making independent decisions about priorities, conflicts, and trade-offs.

Protect time for deep work, travel recovery, and personal commitments, and adapt quickly as priorities shift.

Act as a trusted gatekeeper and point of contact for senior internal and external stakeholders, including clients.

Determine who needs direct access and who can be redirected, and decline requests diplomatically without damaging relationships.

Triage incoming requests, flag what needs the executives' attention, and handle what doesn't independently.

Communications and Inbox Management

Manage executive inboxes by surfacing priorities, drafting responses, filing and archiving, and ensuring nothing time-sensitive slips.

Draft, edit, and send correspondence on behalf of the executives, adapting tone and content to the audience, from clients and senior leaders to internal teams.

Build strong relationships with internal and external stakeholders to deliver a seamless, professional executive experience.

Meeting Preparation and Follow-Through

Anticipate needs ahead of meetings by preparing briefing materials, agendas, attendee backgrounds, and relevant context.

Ensure the executives walk into every meeting prepared.

Schedule and coordinate internal meetings, client meetings, and team events, including room bookings, catering, A/V, and virtual logistics.

Capture action items and drive follow-ups to completion, tracking open loops across both executives so nothing stalls.

Provide regular updates to the executives on outstanding items and next steps.

Strategic Initiatives and Project Support

Help build and scale new initiatives, coordinating timelines, workstreams, and stakeholders across internal teams, clients, and external expert networks.

Track deliverables and deadlines, prepare status updates, and keep the executives informed of progress and risks.

Build and maintain relationships with external experts, partners, and vendors, coordinating outreach, scheduling, and logistics.

Identify opportunities to streamline processes, templates, and recurring workflows, and implement improvements.

Administrative Support

Plan and manage complex domestic and international travel end-to-end, 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 hours submission and timekeeping for the Partners, ensuring accurate and 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 serve as a liaison with office operations, IT, and finance.

Handle confidential information, including personnel, client, and financial matters, with complete discretion.

Qualifications

5–7 years of executive support experience, including supporting senior leaders (Partner, C-suite, or equivalent) in professional services, finance, consulting, or a similarly fast-paced environment.

A track record of operating with autonomy: you make good calls without being told and know 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: you write clearly, concisely, and professionally, and can 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.

Skill at managing up, pushing back diplomatically, and handling sensitive conversations with tact.

Absolute discretion with confidential information.

Advanced proficiency in Microsoft Office (Outlook, Word, PowerPoint, Excel) and comfort learning new tools quickly.

Why Join Us

At Keystone, you will join a collaborative and intellectually rigorous environment where operational excellence supports meaningful, high-impact client work. We offer competitive compensation, comprehensive benefits, and a culture grounded in integrity, curiosity, and teamwork.

The salary range below represents total annual compensation across all U.S. locations. Actual compensation will depend upon the level the individual is hired into based on their experience, knowledge, skills and qualifications. In addition to annual salary, we offer a comprehensive benefits package, 401k contribution, and a culture grounded in integrity, curiosity, and teamwork.

Annual Salary Range$115,000—$130,000 USD

At Keystone, we value the varied backgrounds, experiences, and perspectives our colleagues bring to our firm. We are committed to building an inclusive culture where everyone feels respected, has a sense of belonging, and has opportunities to grow.

This commitment extends to how we hire. Keystone is an equal opportunity employer committed to fair and inclusive hiring practices. All qualified applicants will receive consideration for employment without regard to race, color, age, religion, sex, sexual orientation, gender identity or expression, national origin, disability, protected veteran status, or any other characteristic protected by applicable law.