The OS/Scale 00/Founder Outbound Sprint/Addendum A
Addendum A · List-Building Mechanics

The search syntax behind a 300-account list

Trigger-event search, behavioral-signal search, network-first sourcing, and how to rank the raw list once it is assembled. Supports Step One of the Founder Outbound Sprint.

A · List-Building MechanicsB · Message TemplatesC · The Lean Tool StackD · AI-Assisted DraftingE · What to Track

Search for the moment, not the category

Search LinkedIn's "Posts" filter and company news aggregators for language tied directly to your Ideal Customer Profile (ICP)'s Dimension 2 trigger event, not your product's category name. A confirmed, dated trigger beats ten companies where it is assumed.

Search patterns by trigger type
Funding-round trigger
[Company] AND "raises" OR "Series A"

Filtered to the last 90 days. Search company names alongside "raises," "Series A," or "seed round."

Compliance-deadline trigger
"[Regulation name]" AND [industry]

Search for the specific regulation name alongside your target industry.

Headcount-growth trigger
Job boards, filtered by role

Filter job-posting boards for the specific role your ICP canvas identifies as the buyer. A live posting for that role is itself a behavioral signal.

Hiring-announcement trigger
"SDR team" AND "building"

LinkedIn Posts, filtered to Past month. See the worked example below.

Worked example: the hiring-announcement search

LinkedIn's search bar supports Boolean operators directly. Searching "SDR team" AND "building", filtered to Posts and Past month, surfaces founders and go-to-market (GTM) leaders publicly announcing they are hiring a founding Sales Development Representative (SDR) or actively growing their SDR team.

Example result 1

"I'm hiring and building out our SDR Team at [Company]. I'm hiring a founding SDR (12-24 months of experience is ideal)... Founding seat. You will not be inheriting a playbook, we're building..."

Example result 2

"[Company] is growing our SDR teams in SF and London! If you're excited about building in AI, let's talk. Job description in comments or DM me directly!"

Both are confirmed, dated, first-person trigger events, not assumptions, and the post itself tells you exactly who to contact and what stage the company is at. The same pattern works for any function or role: swap "SDR team" for the specific hire your ICP canvas points to (a compliance hire, a first Revenue Operations (RevOps) hire, a Head of Field Service) and the search surfaces companies where that hiring trigger is live right now. Sort by Past month or Past week and re-run the search weekly, this trigger has a short shelf life, most founders only post about a hire once, in the window when they are actively sourcing for it.

Search for how they describe the problem, not the label

Search LinkedIn's content feed for language your ICP interviews surfaced, how people describe the problem in their own words, not your product's category name.

  • Filter by recency
    Posts from the last 30 days indicate the problem is live in someone's mind right now, not a historical frustration they have already worked around.
  • Check the comments, not just the posts
    Look at who is commenting on posts from known voices in your problem space. Engagement on someone else's post is a stronger signal than a job title match alone.
  • Run your own network before searching cold

    Before searching cold, run your own LinkedIn first- and second-degree network against the ICP firmographic filter. This is the fastest, highest-converting 20 to 30 accounts on the list, and it costs nothing but time you already have. Per Sam Blond's Brex rule referenced in the main blueprint, this is the first source for a reason, do not skip it because it feels too easy.

    Score before you send

    Once the list is assembled, score each account on two axes: how clearly the trigger event is confirmed (not assumed), and how closely the firmographic profile matches the canvas.

    The rule of thumb

    Send the highest-confidence accounts first. A confirmed trigger on a slightly looser firmographic fit is usually worth more than a perfect firmographic fit with no visible trigger. Every account on the final list should pass a one-line test: can you write the first sentence of the outreach message without guessing? If not, cut it or research it further before sending anything.

    A · List-Building MechanicsB · Message TemplatesC · The Lean Tool StackD · AI-Assisted DraftingE · What to Track

    This addendum supports the Founder Outbound Sprint. Ready to build the full 300-account sprint with an operator alongside you?

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