diff --git a/nuxt/content/handbook/sales/professional-services.md b/nuxt/content/handbook/sales/professional-services.md
index 8d3124cd8a..0fdccdb607 100644
--- a/nuxt/content/handbook/sales/professional-services.md
+++ b/nuxt/content/handbook/sales/professional-services.md
@@ -2,7 +2,86 @@
 title: "Professional Services"
 ---
 
-FlowFuse may offer support services as part of an annual subscription. If
-Professional Services are rendered, it is required to document the learnings in
-issues, documentation, and blog content so that the information gleaned is
-available to the rest of the organization and the public.
+FlowFuse offers Professional Services (PS) to help customers deliver work that
+goes beyond standard product support, such as migrations, integrations, and
+solution builds. PS is scoped and captured in a Statement of Work (SoW),
+separately from the subscription.
+
+This page sets out how we scope a PS engagement and write the SoW. It exists to
+stop two recurring problems: SoWs written from second-hand notes, and solutions
+designed before we understand what the customer actually needs.
+
+## Principles
+
+Two rules govern every PS engagement.
+
+### 1. Whoever writes and delivers the SoW takes part in scoping it with the customer
+
+We do not write a SoW from a brief that someone else captured on our behalf. A
+colleague's notes are useful background, but they are not a substitute for the
+delivery person hearing the requirements first-hand. Detail and intent are lost
+each time requirements are passed along, and the person responsible for delivery
+is the one who needs to ask the follow-up questions.
+
+In practice: before any SoW is drafted, the person who will write and deliver it
+joins a scoping conversation with the customer. This can be part of a discovery
+or technical call (see [Discovery Meeting](/handbook/sales/meetings/discovery/))
+or a dedicated session. If that conversation has not happened, the SoW is not
+ready to be written.
+
+### 2. We agree what the customer needs before we propose how to build it
+
+The "how" (the architecture, tooling, and implementation approach) comes after we
+understand the outcome the customer wants and why. Settling on a solution before
+scope is agreed leads to SoWs that solve the wrong problem.
+
+Anyone is welcome to suggest approaches at any point, but until scope is agreed
+those suggestions are non-binding options, not decisions. The PS deliverer owns
+the final solution design. Presenting an early idea as the way we will build
+something, before the need is understood, is the thing we are trying to avoid.
+
+### 3. We do not discuss costing until the SoW content is agreed
+
+Costing follows scope. We do not put a price or an estimate in front of the
+customer, and no one commits to numbers on our behalf, until the technical
+content of the SoW has been agreed with the customer. Discussing cost before the
+work is defined either anchors the customer to a figure we cannot stand behind or
+commits us to work we have not scoped. Once the SoW content is agreed, prepare
+the costing and quote by following
+[Engagements & Pricing](/handbook/sales/engagements/).
+
+## The flow
+
+```mermaid
+flowchart TD
+    Disc["Scoping conversation with customer<br/>(PS deliverer present)"]
+    Needs["Requirements & outcomes agreed"]
+    SoW["SoW technical content drafted by the PS deliverer"]
+    Agreed["SoW content agreed with customer"]
+    Cost["Costing & quote"]
+    Deliver["Delivery"]
+
+    Disc --> Needs
+    Needs --> SoW
+    SoW --> Agreed
+    Agreed --> Cost
+    Cost --> Deliver
+```
+
+## Writing the SoW
+
+The SoW is written by the person who will deliver the work, grounded in what was
+discussed with the customer. For commercials and quoting, follow
+[Engagements & Pricing](/handbook/sales/engagements/).
+
+- Lead with the technical scope and outcomes. Put commercials and costings last.
+- Only list what is in scope. Do not add an out-of-scope section unless the
+  matching item has been stated as in scope.
+- Write for the customer. Keep internal shorthand out of it.
+- Tie each deliverable back to a need raised in the scoping conversation.
+
+## Sharing what we learn
+
+If Professional Services are rendered, document the learnings in issues,
+documentation, and blog content so that the information gleaned is available to
+the rest of the organization and the public.