Process for creating a 30-60-90 day plan (#20906)

BizOps Q3 OKR: fleetdm/confidential#7410
@JoStableford added you as reviewer so you should also receive updates
whilst I'm on PTO.

---------

Co-authored-by: Sam Pfluger <108141731+Sampfluger88@users.noreply.github.com>
Co-authored-by: Joanne Stableford <59930035+JoStableford@users.noreply.github.com>

handbook/company/leadership.md

@@ -374,13 +374,15 @@ Once the new team member replies and accepts their offer in writing, 🔦 Head o
      ```
 2. **Ask hiring manager to send rejections:** Post to the `hiring-xxxxx-yyyy` Slack channel to let folks know the offer was accepted, and at-mention the _hiring manager_ to ask them to communicate with [all other interviewees](https://fleetdm.com/handbook/company#empathy) who are still in the running and [let them know that we chose a different person](https://fleetdm.com/handbook/company/leadership#candidate-correspondence-email-templates).
    >_**Note:** Send rejection emails quickly, within 1 business day.  It only gets harder if you wait._
-3. **Remove open position:** The hiring manager removes the newly-filled position from the fleetdm.com website by [making a pull request](https://fleetdm.com/handbook/company/communications#making-a-pull-request) to delete it from the [open-positions.yml](https://github.com/fleetdm/fleet/blob/main/handbook/company/open-positions.yml) file.
-4. **Close Slack channel:** Then archive and close the channel.
+3. **Remove open position:** Ensure the hiring manager removes the newly-filled position from the fleetdm.com website by [making a pull request](https://fleetdm.com/handbook/company/communications#making-a-pull-request) to delete it from the [open-positions.yml](https://github.com/fleetdm/fleet/blob/main/handbook/company/open-positions.yml) file.
+4. **Create 30-60-90 day plan:** 🧑‍🚀 Hiring manager creates a 30-60-90 day plan outlining key role objectives. The plan is reviewed weekly in 1:1 meetings during the first three months of employment, ensuring continuous support and alignment with company goals. To create the 30-60-90 day plan, hiring manager will:
+    - Create a copy of the [30-60-90 day plan template](https://docs.google.com/document/d/1EztmPBuMFXbVoy4ZToXcxasNO38ooOh8Gh5hPXFvJhI/copy) and rename the copied file using the naming convention `[start date] - 30-60-90 day plan - [teammate full name]` and move it to the [30-60-90 day plan folder](https://drive.google.com/drive/u/0/folders/1QWiAbgBFuuofT_3M8oIoBsbEBmubQAj7) in Google Drive.
+    - Follow the prompts in the template to fill out the 30-60-90 day plan for the new teammate before they start.
+5. **Close Slack channel:** Then archive and close the channel.
 
 Now what happens?  🔦 Business Operations will then follow the steps in the "Hiring" issue, which includes reaching out to the new team member within 1 business day from a separate email thread to get additional information as needed, prepare their agreement, add them to the company's payroll system, and get their new laptop and hardware security keys ordered so that everything is ready for them to start on their first day.
 
 
-
 ## Tracking hours
 Fleet asks US-based hourly contributors to track hours in Gusto, and contributors outside the US to track hours via Pilot.co.