P
AI for Executive Assistant

Custom GPT: Build an Executive Profile Assistant

For Executive Assistants

Tools: ChatGPT Plus (Custom GPT builder) | Time to build: 1.5 hours | Difficulty: Intermediate Prerequisites: Comfortable using ChatGPT Projects daily — see Level 3 guide: "Build a Persistent EA Assistant with ChatGPT Projects"

What This Builds

A shareable Custom GPT configured specifically as an EA for your executive — complete with the executive's bio, communication preferences, common contacts, recurring meeting types, and your standard templates. Unlike a ChatGPT Project (which is private to you), a Custom GPT can be shared with backup EAs, temp staff, or colleagues who need to act in the EA role.

Prerequisites

  • ChatGPT Plus or higher ($20/month)
  • 30–60 minutes to write the system prompt and gather context documents
  • Documents: executive bio, communication guidelines, contact list, key templates

The Concept

A Custom GPT is like a specialized assistant that already knows everything about your executive's world. You set it up once with detailed instructions and reference files. Anyone who uses it gets an assistant that's already calibrated — no re-explaining context, no starting from scratch.

Build It Step by Step

Part 1: Gather your context documents

Before building, assemble these documents. Even rough drafts work:

  1. Executive Profile (1 page): Full name, title, company, role description, key priorities, communication style preferences, preferred formats (bullets vs. paragraphs, formal vs. casual), pet peeves (things they hate in communications)

  2. Contact List (spreadsheet or doc): Key contacts the EA communicates with on the executive's behalf — name, title, company, relationship context, preferred communication style with this person

  3. Template Library (one file): Your standard templates — meeting agenda format, follow-up email structure, briefing format, travel itinerary format

  4. Meeting Types (half page): Recurring meeting types with context — "Monday standup = internal team, casual," "Board monthly = board members, very formal," "Investor calls = formal, no jokes"

Part 2: Create the Custom GPT

  1. Go to chatgpt.com → click your profile icon → "My GPTs" → "Create a GPT"
  2. You'll see a GPT Builder interface with two options: "Create" (conversational setup) and "Configure" (direct setup)
  3. Click "Configure" — this gives you direct control over the system prompt

Part 3: Write the system prompt

In the "Instructions" field, write the complete system prompt. This is the most important step. Use this template:

Copy and paste this
You are an experienced Executive Assistant working directly for [Full Name], [Title] at [Company Name].

## About [Executive Name]
[Full bio in 2-3 paragraphs: their role, what they're responsible for, their management style, their priorities this year]

## Communication Style
When drafting any correspondence on behalf of [Executive Name]:
- Tone: [formal/professional/warm but direct]
- Length preference: [brief and bullet-pointed / detailed and thorough]
- Sign-off: [their typical sign-off style]
- Avoid: [specific phrases or styles they dislike]
- Preferred salutation: [Dear X vs. Hi X vs. Hello X]

## Key Relationships
[Name, Title, Company] — [relationship context: "long-term client, formal relationship, always use Dear [Name]"]
[Name, Title, Company] — [relationship context: "peer, warm relationship, first names fine"]
[repeat for 5-10 key contacts]

## Standard Tasks
When asked for a [meeting agenda / briefing / follow-up email / travel itinerary], use these formats:
- Meeting Agenda: [describe your standard format]
- Briefing Doc: [describe your standard format]
- Follow-up Email: [describe your standard format]

## Important Context
[Company name] is in [industry]. Key current priorities: [2-3 priorities].
Always maintain confidentiality — do not reference client names, deal details, or internal information outside of what's provided in the conversation.

Part 4: Upload knowledge files

In the GPT Configure screen, look for "Knowledge" → "Upload files." Upload your context documents:

  • Executive Profile doc
  • Contact list (as PDF or doc — not CSV for security)
  • Template Library
  • Meeting Types guide

The GPT will reference these files when answering questions.

Part 5: Configure capabilities and sharing

  • Toggle off "Web Browsing" (for privacy — you don't want it searching for your executive's name)
  • Toggle off "Image Generation" (not needed for EA work)
  • For "Only me" — keep private while you're building
  • For sharing with a backup EA: change to "Anyone with the link" and share the link

Part 6: Test it

Click "Preview" and test with real tasks:

  • "Draft a reply to [contact name]'s meeting request for next week"
  • "Create a 1-page briefing for tomorrow's call with [contact]"
  • "Write a follow-up email from yesterday's board meeting"

Compare the output quality to what you get from a standard ChatGPT session without context.

Real Example: Complete Workflow

Setup: Custom GPT configured for Sarah Chen, CEO of Meridian Health Systems, with full context loaded.

Input: "Draft a reply to Marcus Webb at Atlantic Partners — he's asking to schedule a 30-minute intro call next month."

Output (without additional context):

Copy and paste this
Dear Marcus,

Thank you for reaching out. Sarah would be glad to connect
for a brief introductory call.

I'll be in touch next week with some available times.
Looking forward to the conversation.

Best regards,
[EA signature]

Note: The GPT already knows Marcus is an external contact, knows Sarah's preferred tone, and knows to defer scheduling rather than commit to a specific time — all from the system prompt.

Time saved: 3–5 minutes per task multiplied by 20–30 tasks per day = 60–150 minutes of context-loading eliminated.

What to Do When It Breaks

  • Output doesn't match executive's style → Review and refine the Communication Style section of your system prompt — add 2–3 example sentences in their actual voice
  • GPT doesn't know a contact → Add them to the Key Relationships section; upload an updated contact list
  • Output is too long → Add to system prompt: "Default to brief responses unless the user asks for more detail. Use bullets where possible."
  • Confidentiality concerns → Remove the knowledge file with sensitive contacts; keep only formatting preferences and style guidance in the instructions

Variations

  • Simpler version: Skip the knowledge file uploads and just write a detailed system prompt — faster to build, slightly less context-aware
  • Extended version: Add a "Frequently Asked Questions" document to the knowledge base with answers to common research questions about your executive's organization

What to Do Next

  • This week: Build a basic version with just the system prompt (no files) and use it for 5 days
  • This month: Add knowledge files and refine the system prompt based on where it produces wrong output
  • Advanced: Share with your backup EA and have them use it for a week — their feedback will highlight what context is missing

Advanced guide for Executive Assistant professionals. ChatGPT's Custom GPT feature requires a paid plan. Interface may change.