Senior Executive Assistant · Ph.D. · New York

LinwanFeng

Bridging doctoral-level analytical precision with six years of Founder-level executive operations — across four global regions, three business divisions, and a deployed AI workflow tool.

Ph.D. Applied Mathematics Published · JCP AI-Enabled Operations Bilingual EN · 中文 NA / EU / APAC / Oceania
Key Metrics
0+ yrs
C-Suite / Founder Support
$0K
Max Event Budget
0M+
Platform Users Supported
0+
Attendees / Global Event
0+
Weekly Meetings, Zero Conflicts
0
Global Time Zones
RoleSenior Executive AssistantFounder & C-Suite · Global Ops
AcademicPh.D. Applied MathematicsNew Jersey Institute of Technology
ResearchPublished · JCPJournal of Computational Physics
AIAI Agent BuilderFully built · demo running
LanguagesEnglish · 中文Full professional bilingual
Profile

Where analytical rigor
meets executive precision

Six continuous years supporting a Founder across a global multi-entity organization spanning media, nonprofit, and digital platforms — built on a foundation most executive professionals do not have: a doctorate in Applied Mathematics.

I manage 20+ weekly meetings with zero conflicts across NA, EU, APAC, and Oceania; triage 15–20 international priority emails daily; and serve as the Founder's first-line escalation owner. I own board preparation cycles, liaise directly with outside counsel on legal review, and deliver structured financial reporting to the CFO.

Beyond operations, I built and launched Annie the Agent — a live AI booking product — and hold an active peer-reviewed research record. My Ph.D. training is not decorative; it shapes how I analyze, structure, and communicate at speed.

Peer-Reviewed Research

Accepted in Journal of Computational Physics

Accepted · Forthcoming 2026 Journal of Computational Physics · Elsevier
Preconditioning and Linearly Implicit Time Integration for the Serre-Green-Naghdi Equations
AuthorsLinwan Feng, David Shirokoff, Wooyoung Choi
ManuscriptJCOMP-D-25-01451R1
SubmittedJune 18, 2025
FieldNumerical Analysis · math.NA

Introduces a constant-coefficient preconditioner for the Serre-Green-Naghdi (SGN) constraint operator with rigorous bounds on the preconditioned condition number — incorporating bathymetry effects in two dimensions, guaranteeing mesh-independent performance for Krylov methods, and developing two linearly implicit time integration strategies for dispersive shallow water wave equations.

AI Product

Built from scratch,
live in production

Fully Built · Demo Available Upon Request
Annie the Agent — AI Booking for Local Businesses

A 24/7 AI booking agent I independently designed and built for home service businesses — plumbers, HVAC, salons, contractors. The system handles the full customer conversation: detecting emergencies, verifying service area by ZIP code, collecting customer info, and confirming appointments automatically — so owners never miss a job while on-site.

The current build is fully operational — live merchant dashboard, English/Chinese bilingual support, smart time-slot scheduling, and emergency-flagging logic. The product has a phased roadmap extending into AI phone answering, SMS notifications, Google Calendar sync, and multi-contractor management. Built end-to-end: conversation design, backend architecture, and deployment — reflecting the same operational systems thinking I bring to executive work.

24/7 AI Conversation Emergency Detection ZIP Code Coverage Auto Scheduling Bilingual EN · 中文 Live Dashboard

Demo available upon request.

Core Competencies

Six pillars of
executive capability

i.
Executive & PA Support
Founder & C-Suite EA · Personal Assistant · Executive Prioritization & Decision Filtering · Stakeholder Management · Gatekeeping · Crisis Escalation · Confidential Governance
ii.
Calendar & Communications
Multi-Time-Zone Management (NA/EU/APAC/Oceania) · Executive Inbox Triage 15–20/day · Correspondence Drafting · Cross-Functional Coordination · Outside Counsel Liaison
iii.
Meetings & Governance
Board-Level Preparation · Agenda & Briefing Materials · Minute Documentation · Action Tracking · Full Meeting Lifecycle · Legal Document Review · Compliance Research
iv.
Events & Travel
End-to-End Event Leadership ($200K–$900K) · International & Interstate Logistics · 100–200+ Attendees · Vendor Negotiation · VIP & Hospitality
v.
HQ Operations & Finance
Headquarters Office Management · Vendor Contracts · Senior Hire Onboarding · IT/AV Coordination · Full-Cycle Budget Admin · CFO-Level Financial Reporting
vi.
Technology & AI
MS Office · Google Workspace · Outlook · Slack · Zoom · Teams · SharePoint · DocuSign · Concur · Asana · Notion

AI: ChatGPT · Claude · Gemini · AI Agent Design & Deployment
Professional Experience
Jul 2020 – Present
Global Multi-Entity Organization
Confidential
Media · Nonprofit · Digital Platform
New York, NY
↑ Promoted · Expanded Scope
Senior Executive Assistant
to Founder
Primary EA to Founder; concurrent support to 3 HQ senior leaders across 3 divisions with distinct payroll entities and unified HQ structure.
0+
Meetings / week
0–20
Priority emails / day
$0K
Max event budget
0M+
Platform users
  • Primary EA and PA to Founder across 6-year tenure — managing professional and personal scheduling, private travel, personal correspondence, and confidential personal logistics alongside full executive operations across all divisions; maintain tiered protocols across executive, financial, legal, and governance documentation.
  • Manage high-volume executive calendar averaging 20+ meetings per week with 1–2 urgent same-day insertions; maintain zero scheduling conflicts across NA, EU, APAC, and Oceania; triage 15–20 international priority emails daily, drafting executive-level responses and serving as first-line escalation owner across all four regions.
  • Own end-to-end logistics for large-scale international engagements with full budget ownership of $200K–$900K per event; direct travel and hospitality for 50–60 senior global leaders; on-site coordination for 100–200+ attendees; rolling interstate travel ~every 3 weeks, international quarterly.
  • Facilitate full recurring executive cadence: 3 weekly HQ leadership meetings, bi-weekly global senior symposiums (4 regions), and monthly board preparation cycles — agenda, executive briefings, minute documentation, and action tracking.
  • Supported in-house fashion brand sales operations through Jul 2023 — coordinating NYC warehouse logistics, outbound fulfillment and shipments, and cross-functional execution with the sales team on pricing strategy and inventory workflow.
  • Served as external-facing liaison for the organization's blockchain and digital asset initiatives — managing client communications on token listing compliance, coordinating with outside legal counsel on regulatory requirements, and handling time-sensitive escalations around promotional and operational compliance reviews.
  • Serve as primary liaison to outside counsel — legal document review, compliance research, attorney coordination; prepare executive-ready summaries of obligations and risk areas; oversee HQ operations including vendor contracts, IT/AV, senior hire onboarding, and monthly CFO-level financial reporting.
  • Apply ChatGPT, Claude, and Gemini to streamline executive research, drafting, and briefing workflows; independently built and deployed a live AI workflow agent — demonstrating applied AI capability beyond standard tool adoption; supported platform scale to 8M+ users and nonprofit fundraising to eight-figure levels.
Education

Academic foundation

Ph.D.
Applied Mathematics
New Jersey Institute of Technology
Analytical foundation applied to executive operations, financial oversight, and peer-reviewed publication in numerical analysis.
M.S.
Applied Mathematics
New Jersey Institute of Technology
B.S.
Mathematics & Applied Mathematics
Northwestern Polytechnical University