Episode 139
Why Tone and Trust Define How People Learn
Teaching in technical industries is not about how much you know. It is about whether people feel safe enough to learn.
Episode summary
Don Gillis started in the field, digging underground ductwork in frozen Ohio winters, earning his HVAC journeyman license, and learning the trade alongside plumbers and electricians before most of his peers had any idea what a career in HVACR would look like. Over three decades, that path took him through service management, outside sales, national training events, and eventually international roles as a Senior Technical Trainer at Copeland Compressors and The Chemours Company, where he delivered hands-on education to thousands of HVACR professionals across North America. Today he serves as a technical trainer at HARDI, building curriculum for distributors, counter sales teams, and technicians across the distribution channel.
This episode is not about training methodology in the abstract. It focuses on a specific and often overlooked distinction: the difference between showing up and delivering information, and genuinely teaching someone. Don has been in rooms where the first approach produces nothing but attendance records. He has also been in rooms, sometimes running them, where people who came in skeptical leave with something that changes how they do their job. The difference, he argues, is almost never the content. It is the environment. And the environment is built through tone, trust, and what you do before the first slide appears.
The conversation moves between the field, the classroom, and the leadership moments in between. Don is candid about the lessons that took the longest to arrive, including the one he worked through on a drive home during six difficult months as a service manager, when he realized that reacting quickly was the wrong instinct and listening first was the only thing that actually worked. He is also building something new right now at HARDI: a training program built entirely around the idea that words matter, but tone matters more.
This episode will land with anyone who leads, trains, or develops people in a technical industry. The principles apply as directly to a sales director managing a customer-facing team in electronics distribution as they do to a training manager in HVACR.
You Will Learn
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Why tone matters more than content when technical training is under pressure, and the program Don is building around this idea
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How he creates psychological safety in a room full of skeptical technicians before the first slide appears
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The hardest leadership lesson of his career: listen more, talk less, and what six months as a service manager taught him about pausing before reacting
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How to build retention when you only have someone for two hours, four hours, or a single day
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Why failed training is almost always a delivery problem, not a student problem
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What leadership without a title looks like, and how one moment on a frozen job site shaped his philosophy
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How to design feedback loops that improve your delivery instead of just measuring attendance
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Listen now and subscribe to Leadership in Manufacturing.
Key takeaways
Tone Is a Leadership Tool, Not Just a Communication Technique
Don is building a training program for HARDI’s distributor network, counter sales, tech support, and outside sales, built around one central idea: the same words, delivered in different tones, produce completely different outcomes. “Let’s work through this together” and “call me back when you have the right readings” can contain the same information. They land in entirely different emotional registers. One invites collaboration. One signals judgment.
He uses scenarios in his training where participants say identical words with different tone and watch the reaction change. The purpose is not to make people nicer. It is to show them that tone is an operational variable, one that determines whether a technician on a support call opens up or shuts down, whether a student in a classroom asks a real question or performs compliance, whether a customer who called to complain leaves with a problem solved or a relationship lost.
This mirrors what effective leaders do in every feedback conversation, every difficult meeting, every change announcement. The tone of the room is set before the content arrives. And the leader sets it.
“Words matter, but more importantly, tone matters. You say the same words, but you put them in different directions. You encourage them, let’s work through this together, as opposed to what are your numbers?”
Trust Is Built Before the First Slide
Don describes walking into a room of technicians who did not volunteer to be there. They are used to vans and job sites. A training room is unfamiliar. They are nervous about looking uninformed. They are already managing discomfort before he has said a word.
His first move is not the agenda. It is the environment. He makes clear that questions are welcome and that wrong answers are part of the process. He never calls people out. When someone gives an incorrect answer, his response is “I like the way you’re thinking” before he redirects. And one of the first things he tells every training room is that someone in their organization saw enough value in them to put them on a flight, cover their hotel, and pull them out of revenue-generating work. That is not filler. It is deliberate setup. People who feel seen before the learning starts learn more during it.
The same principle applies to any high-stakes conversation a leader has. The relational setup determines how much of what follows actually lands.
“I see value in this room right now. What I mean by that, someone saw a value in you enough to put you on a flight, take care of your hotels and meals, and take you out of the field.”
Feedback Is a Growth System, Not a Report Card
Don’s approach to feedback is unusually systematic. He switched from paper evaluations to QR codes specifically so participants could respond privately, reducing the social pressure that makes honest feedback rare. He adds a section to every evaluation asking what he could have done better. He tracks failure patterns in post-training assessments not to flag struggling participants but to identify where his teaching was unclear. And he follows training events with webinars to close the gap between delivery and retention.
The underlying principle: if someone leaves your training and cannot apply what you covered, the problem lives with the trainer, not the student. He remembers being a service manager and sending a technician to an expensive industry event, only to hear back “it was a dog and pony show, I didn’t learn anything.” That bothered him then. It still does. Training is an investment, and the return is measured by what people can do differently afterward, not by whether the room was full.
“I can’t grow without that feedback. What would you have liked to see? What could I have done better? Because I can’t get better without knowing.”
Why this matters
Technical industries have a knowledge transfer problem that is not going away. Experienced professionals are retiring. The people coming behind them are inheriting complex systems and the gaps left by decades of institutional knowledge walking out the door. How organizations develop people right now will determine how well that transition goes.
Most training investment is wasted not because the content is wrong but because the delivery misses. When tone is off, people protect themselves instead of learning. When trainers position themselves above the room, participants comply rather than engage. When feedback only flows one direction, problems compound. The leaders and trainers who understand this, who build trust before they deliver content, who adjust their tone deliberately, who listen before they speak, are building organizations that can actually grow.
That is what makes this episode relevant well beyond the HVACR industry. The distribution channel, the electronics supply chain, the semiconductor sales team, anywhere technical knowledge needs to move through people, these principles apply.
“Real leadership is often quieter than people think. Sometimes it is listening longer. Sometimes it is changing your tone. Sometimes it is simply making people feel seen.”
Episode highlights
The Service Manager Who Learned to Pause
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- Don describes six months of driving home from a service management role carrying every customer escalation personally. The turning point came on a specific stretch of road, he still remembers exactly where he was, when he realized that reacting quickly was the problem. He started pausing. He would hear customers out fully, acknowledge when they were right, and let the argument dissolve before it formed. His colleagues started stopping by his desk to watch him handle calls. None of that came naturally. It came from pressure, reflection, and a decision to try something different.
Presenting in the Kitchen Before Presenting to Anyone Else
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- When Don stepped into a national training role, he had expertise to build fast. His method: flashcards, self-recorded video presentations, and practice sessions in his kitchen with his wife and sons as the audience. His wife’s review after the first run, “I didn’t understand any of it, but it sounded really good,” remains one of the more honest pieces of feedback he has received. He used every available flight, every drive, every spare hour to build fluency before he needed it in front of a room.
The Frozen Ground and the Shovel
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- One of the clearest illustrations of leadership without a title: Don describes a winter job site, five people freezing, morale low, work stalled, everyone complaining. Rather than say anything, he grabbed a shovel and started digging. Within minutes, everyone else joined in. No title. No speech. Just initiative, and it changed the energy of the whole job.
What manufacturers are building that will change how reps work
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- Several manufacturers on Hunter’s line card are developing AI agents that go beyond basic chatbots, giving customers direct access to open order reports, backlog data, and more granular product information in real time. Others are building FAE-level AI tools for product selection behind the scenes. Reps who understand what their manufacturers are building will be better positioned to leverage those tools in the field.
The Boss Whose Phone Was Not Ringing
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- Don once asked his manager directly how he was performing, after a review that covered everything except actual feedback. The answer: “My phone’s not ringing.” That was the entire review. Don understood immediately, his job was to run his area well enough that no complaints reached his manager. That framing has stayed with him: good leadership makes the people above you look good because the work is being done right.
Training That Does Not End on the Last Day
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- Don is building a counter sales program at HARDI that includes prerequisites completed before the in-class session, interactive quizzes built into the curriculum, and a follow-up webinar after. The follow-up is not a check-in. It is a designed mechanism to surface what did not stick and give him data on where the teaching needs to improve. The goal is not to catch failures. The goal is to close the gap between day one and the job.
Practical Tip
Build the Environment Before You Build the Content
Whether you are running a training session, leading a difficult conversation, or announcing a change to your team, the environment you create in the first few minutes determines how much of what follows will actually land. Before you open any agenda or deck:
- Acknowledge the room. Tell people what you see, who they are, why they are there, what it took for them to show up.
- Remove the threat of being wrong. Make clear early that questions are welcome and wrong answers are starting points, not failures.
- Never call people out. If someone gives an incorrect answer, start with what is right about the thinking before you redirect.
- Check your own tone before you say anything. If you are tense, the room will feel it. Don used recorded practice sessions to spot his own mannerisms and remove the nerves.
- Make it safe not to know. The fastest way to stop a room from learning is to make people afraid of looking uninformed
Do this consistently and your team will start bringing you the real problems instead of the managed versions.
About the guest
Don Gillis
HVACR Technical Trainer at HARDI
Don Gillis has spent more than three decades in the HVACR industry, starting in the field and earning his HVAC journeyman license under the International Mechanical Code before moving into service management and technical training. His path led to international training roles at Copeland Compressors and The Chemours Company, where he served as a Senior Technical Trainer and delivered hands-on education to thousands of HVACR professionals across North America.
Today he serves as a technical trainer at HARDI, developing practical curriculum for distributors and the professionals across the distribution channel. He is currently building a counter sales training program that includes prerequisites, in-class instruction, and follow-up webinars designed to ensure retention beyond the training day. His core conviction has not changed since his early days in the field: if people leave without retaining what was taught, the trainer needs to look at the teaching.
Who this episode is for
This episode is built for:
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- Leaders in distribution, HVACR, and technical industries who are responsible for training or developing their teams
- Sales managers and directors who lead customer-facing technical teams and want to understand how tone shapes outcomes
- Technical trainers and training managers who want to build programs that produce retention, not just completion
- Service managers and operations leaders who manage escalations, pressure, and difficult conversations under stress
- Anyone in a technical industry who leads, coaches, or develops people and wants to do it better
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What you will be able to do after listening
After listening to Episode 139, you will be able to:
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- Identify where tone, not content, is the actual barrier in your team’s communication
- Build psychological safety before any information changes hands
- Apply Don’s listen-first, pause, acknowledge framework to de-escalate tense interactions
- Design follow-up that closes the gap between training delivery and real retention
- Recognize the difference between delivering information and developing people
- Use feedback loops, evaluations, pattern analysis, follow-up sessions, to improve your own delivery
- Lead without a title by demonstrating ownership in visible, practical ways
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How to Lead When the Rules Change Between Startup and Enterprise – Episode 137
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How to Build Trust as a Modern Rep Using AI to Prep Smarter Conversations – Episode 136
Part 2 with Tom Walker on how modern manufacturers reps use AI to build trust, strengthen culture, and stay relevant in a changing sales environment.
