The Business Acumen of Non-Sales People “Unselling” the Sale
If you are a sales professional selling a sophisticated solution that requires support from others in
You are deep into a deal. Months of discovery, relationship-building, demos, and internal negotiations. The customer is leaning in. Procurement is asking the right questions. The finish line is in sight. And then it happens.
The technical engineer, consultant, or product specialist who is supposed to support the sales process somehow derails the meeting.
Maybe they show up looking like they just walked out of a weekend hackathon instead of a business meeting. Maybe they start lecturing the customer instead of listening. Or worst of all, they interrupt the salesperson and begin explaining things in a way that completely confuses the customer.
In sales jargon, this is known as “unselling the sale.”
And if you have been in sales long enough, you have probably watched one of these moments unfold in real time. The customer asks a simple question. The salesperson begins to answer.
And then the technical expert jumps in and says something like:
“Actually, that’s not entirely accurate. Let me explain the architecture.”
Thirty minutes later, the customer is confused, the salesperson is staring at the table, and everyone in the room is wondering how a simple conversation somehow turned into a graduate-level engineering lecture.
Congratulations.
The deal you spent three months building just entered the “unselling zone.”
But the issue goes beyond an awkward meeting.
From a business acumen perspective, the consequences can be significant. A lost deal isn’t just a missed commission. It represents lost revenue, lost margin, damaged customer trust, and often lost future opportunities.
In many organizations, non-sales professionals don’t fully understand the fragile dynamics of a sales process. They believe they are adding expertise when, in reality, they may be unintentionally undermining the relationship.
Over the years, while designing and delivering business acumen–focused sales training programs, I have heard countless stories about deals that were unintentionally sabotaged by well-meaning internal experts.
The good news is that this problem can be managed.
Here are five things that can dramatically reduce the risk of unselling the sale.
1. Make Sure Everyone Understands the Real Objective of the Meeting
Technical experts often assume their job is to prove how smart they are.
In reality, the goal of most customer meetings is much simpler:
Help the customer feel confident in making a decision.
That requires listening, clarity, and trust—not a technical dissertation.
Before any customer interaction, the team should align on:
Alignment prevents confusion, and confusion kills deals.
2. Establish the Salesperson as the Quarterback
In high-performing organizations, the salesperson acts as the quarterback of the deal.
Technical experts, consultants, and product specialists play critical roles—but they are supporting players in the sales conversation.
When this structure breaks down, chaos often follows.
The customer should never feel that the internal team is competing with one another for airtime or authority.
Strong sales teams make it clear:
Simple discipline can prevent a lot of accidental damage.
3. Teach Non-Sales Professionals the Economics of the Deal
One of the most powerful ways to change behavior is to help internal experts understand the financial impact of their actions.
When engineers and consultants realize that a poorly handled meeting can result in:
…their mindset often changes quickly.
This is where business acumen training becomes incredibly valuable. When people understand how deals connect to revenue, margins, and company growth, they begin to approach customer conversations very differently.
It stops being “just a meeting.”
It becomes part of the economic engine of the business.
4. Prepare Technical Experts for Customer Communication
Brilliant technical professionals are not always naturally skilled at customer communication, and that’s perfectly normal.
But preparation matters.
Before important customer meetings, sales teams should spend time preparing internal experts on:
One of the best pieces of advice I’ve heard from experienced sales leaders is simple:
Don’t impress the customer with complexity. Impress them with clarity.
Customers rarely buy because they are overwhelmed by technical details.
They buy because they feel confident in the solution.
5. Debrief Every Customer Interaction
Great sales teams always debrief after important customer meetings.
What worked?
What confused the customer?
What should we do differently next time?
These short conversations are extremely valuable because they help non-sales team members learn the art of selling over time.
Many engineers and consultants eventually become fantastic customer-facing professionals—but only if they receive feedback and coaching.
The Bigger Lesson
Selling complex solutions has never been more challenging.
Customers are more informed, competition is intense, and decision processes are longer and more complicated than ever.
The last thing any company can afford is to lose deals because of internal misalignment.
The irony is that most people who “unsell the sale” are not trying to sabotage the deal. They are simply trying to help.
But without understanding the dynamics of customer relationships and the business impact of their behavior, good intentions can easily create bad outcomes.
The companies that consistently win understand a simple truth:
Selling is a team sport.
And everyone on that team needs to understand how their behavior either helps close the deal or quietly pushes it away.