Most sponsors spend months choosing the platform CEO. They run a formal process, check references twice and debate the pay plan in committee.
Then they close an add-on and give its leadership a few days. The founder agrees to stay "through the transition." The deal team moves on to the next target.
Here's the reality. The platform CEO sets direction, but the add-on leaders run the business.
They hold the customer relationships, price the work, schedule the crews and keep the technicians. If that layer is weak, the thesis stalls no matter who sits at the top.
The CEO seat gets attention for good reason. AlixPartners' 2026 Private Equity Leadership Survey found that 65% of private equity firms report CEO turnover during the holding period. The same survey found that CEO turnover spikes around year two.
Below the CEO, there is no public scoreboard at all. I think that is part of the problem.
What is the second layer?
The second layer is the group of leaders one level below the platform CEO who run the acquired businesses day to day. They turn a purchase into a working company.
In HVAC and mechanical services, controls integration, MEP engineering and energy services, that usually means:
- the general manager of each add-on
- branch and operations leaders
- service and project leaders
- the senior technical people customers actually call
It is not the platform's corporate staff. Corporate sets the standards. The second layer has to live them on a Tuesday morning with a chiller down and a crew short.
In a buy-and-build, this layer multiplies fast. In its July 2026 update, Capstone Partners counted 38 private equity add-ons in HVAC services so far that year. That was 41.3% of all deals in the sector, against nine new platforms.
Every add-on brings its own second layer, and every one of those seats needs an answer.
Five ways the second layer fails
I have spent 15 years in building and energy executive search. When a roll-up struggles, the cause is rarely the strategy. It is usually one of these five patterns.
The founder stays on as general manager with no successor
The founder sells, rolls equity and agrees to run the business for a defined period. Nobody names a successor, because the founder is still there.
Then the founder steps back. The business has no one ready to run it, and the search starts from zero while customers are already asking questions.
A founder staying on is not the problem. A founder staying on with no named successor is.
The integration leader is hired too late
Integration starts the day the deal closes: systems, pricing, safety programs, purchasing and reporting. Too often the integration leader arrives after the third or fourth add-on.
By then, half-finished integrations are slowing the whole platform. The job has turned from design into cleanup.
A corporate operator who has never run a branch P&L
Sponsors like polished operators from larger companies. Some of them are excellent. But a leader who has managed a function and never owned a branch P&L will struggle here.
In these businesses, margin is won or lost on technician utilization, job costing and change orders. Ask one question early: has this person ever answered for a local P&L, with crews, customers and collections?
Comp and earn-outs that work against the new leaders
Earn-outs keep the seller focused on the numbers. They can also push a founder to protect short-term earnings at the expense of the people who will run the business next.
Meanwhile, the new general manager carries the integration work on a bonus tied to targets they did not set. When the seller's incentive and the successor's incentive point in different directions, the successor usually loses.
Technical talent follows the founder out
Loyalty in these businesses is personal. Senior service technicians, controls programmers, commissioning agents and project engineers often joined because of the founder. When the founder leaves, they start getting calls.
The labor market makes those calls easy to take. The Bureau of Labor Statistics projects about 40,600 openings a year for HVAC and refrigeration mechanics and installers, on average, from 2025 to 2035. And in the AlixPartners survey, 44% of portfolio leaders reported a higher risk of losing top performers.
What does good look like?
Good second-layer planning is not complicated. It is done before close instead of after the first missed quarter.
A 100-day leadership plan. For each add-on, write down who runs it on day one, day 100 and day 365. Then write down what has to be true for each handoff. Put the plan in the deal model, next to the cost and revenue targets.
A seat-by-seat review. Look at every role that touches customers, pricing, crews or cash. For each seat, decide to keep, develop or replace. Do it with the platform CEO in the room, not as a side exercise for HR.
A bench for each add-on. Name one internal successor or one mapped outside candidate for every critical seat. A bench that lives only in someone's head is not a bench.
Comp built for operators. Pay the second layer on what they control: gross margin, service agreement growth, technician retention, safety and cash collection. Make sure the earn-out and the successor's plan point the same way. Give the people building the platform a real line of sight to equity value.
10 leadership questions before you close an add-on
- Who runs this business on day one, and who runs it in year two?
- Has the founder named a successor, and would the founder hire that person today?
- Which three people would hurt most if they left in the first 90 days?
- Which customer relationships live with the founder alone?
- Who owns pricing, estimating and job costing, and how good are they?
- Has the likely general manager ever run a P&L at this size?
- Who leads integration, and when do they start?
- Does the earn-out reward anything that could hurt the people staying behind?
- How are senior technicians and engineers paid, and what would a competitor offer them?
- If the general manager resigned next month, who would you call?
When should a sponsor start the search?
Start during diligence, not after the founder announces a retirement date. Before close, the work is assessment and quiet market mapping: who is in the business, who could step up and who is out there.
After close, the search for any critical seat should launch the same week. If the seat has to change quietly, run it as a confidential search with no posting, and agree off-limits terms in writing before work starts.
The timing math is simple. A well-run executive search takes months, and the right candidate usually has notice to give. We plan a search for 10-14 weeks from kickoff to an accepted offer, then check in at 30, 60 and 90 days after the start date.
If the founder's exit is 12 months away, the search should already be on the calendar.
What's the hardest seat in an HVAC services roll-up?
In my view, it is the general manager who replaces the founder of an acquired commercial service business. That person has to keep the founder's customers and keep technicians who were loyal to someone else. They also have to run to the platform's reporting rhythm, all in the same quarter.
Those skills rarely sit in one person. Strong service operators often have not worked inside a sponsor's reporting cadence. Strong corporate managers often have not run dispatch, service agreements and a crew of technicians.
The search turns on finding someone who has done both, or who has done one and clearly learned the other.
What should you do next?
If you are about to close an add-on, run the 10 questions with your deal team this week. If more than two answers are "we're not sure," the second layer needs work before the wire goes out.
That is the work we do. One partner owns every search, start to finish, and it starts with a conversation about the seats, not a job description. If you want a second set of eyes on an add-on's leadership before close, let's talk.