Update engagements.md

src/handbook/sales/engagements.md

@@ -158,3 +158,43 @@ as evidenced by a PO or signed quote, is the sole determinant.
 - Contract Start Date
 - Company address
 - Renewal Date
+
+## Deal Approval Process (Deal Desk)
+To ensure consistency and efficiency in our deal cycles, all proposals must follow the established Deal Desk workflow. This process covers the end-to-end journey from initial proposal creation through security review and final legal/contract execution.
+
+### Overview of the Flow
+
+#### Proposal Stage
+
+Sales reps create proposals and determine if the deal structure (discounts, terms, payment schedules) is standard. Non-standard deals are routed to the CEO via Slack for approval.
+
+```mermaid
+graph TD
+    %% Nodes
+    Start["Is the deal structure standard?"]
+    AcceptProposal["Customer accepts the Proposal 'Agreed in Principle'?"]
+    Negotiate["Rep must negotiate with the customer"]
+    DealCriteria["Is there a discount?
+                Is the term > 1 year?
+                Payment terms > Net 30<br />"]
+    CEO["Route to CEO for Slack approval"]
+    Security["<b>Go to Security Process</b>"]
+
+    %% Connections
+    Start -- Yes --> AcceptProposal
+    Start -- No --> DealCriteria
+
+    AcceptProposal -- No --> Negotiate
+    AcceptProposal -- Yes ----> Security
+
+    Negotiate --> Start
+
+    DealCriteria -- No --> Security
+    DealCriteria -- Yes --> CEO
+
+    CEO -- Reject --> Negotiate
+    CEO -- Accept --> Security
+**Security Review**: If a customer requires a security review, the AE coordinates between the customer's questionnaire and the CTO/Engineering team to provide approved answers.
+**Legal & Contract Process**: This stage handles the Master Subscription Agreement (MSA). Depending on whether the customer accepts our standard MSA or requests minor/major redlines, the contract is routed to Legal (Amy) and/or the CEO for cost and term approval before final signature.
+
+Please follow the detailed step-by-step routing and decision points outlined in the [Deal Desk Flow Document](https://docs.google.com/presentation/d/1dnv-x9YMHirI3ctVLl2paRScoTwgwWXdLn1rG3rlFbc/edit?usp=sharing)