Every interior design firm owner I work with wants to grow—more projects, more revenue, a bigger team to carry the load. What catches my clients off guard is how quickly team growth can erode the culture they spent years building. The problem is rarely the people they hire. Instead, it is what happens to those people after onboarding.
New team members cannot follow processes they are not taught. But all too often, they get handed live projects before they understand how the firm operates—and with little insight into how decisions are made, how the firm talks to clients, or what “done” looks like. Left to their own devices, these new hires pick up the company’s way by osmosis, absorbing fragments from whoever happens to be nearby. On a team of six or eight people, that often works. Eventually, though, it doesn’t. Once a firm expands beyond that size, proximity is no longer a suitable stand-in; new hires are left guessing how to fit in and how to do the work the way the firm expects.
The most challenging piece of this top-down procedural problem resides with the founder. The firms that struggle most are the ones so buried in work that their leaders never stop to consider what it takes to bring new people on effectively. These principals underestimate the time cost of off-the-cuff, non-documented and non-replicable training. Their own hours climb sharply, and they miss what rapid growth demands: You cannot absorb a bigger team without making room for it. Creating that capacity means handing off work that carried the firm to this point—a step most owners resist until it costs them in quality, missed deadlines, culture breakdowns or burnout.
Breaking points by the numbers
Growth does not strain culture evenly. It strains the team in big steps. The most predictable damage happens when a firm adds more than two people at once without a plan for onboarding them. A team can absorb one new person at a time. But add two, three, four at the same time, and your existing staff will be too stretched teaching to do their own work well—so they stop teaching, and the new hires stop learning. Within a few months you have a group of employees who were never shown the standard, and the quality your clients count on starts to slip. By the time you spot the issues, your client service and satisfaction are at risk.
There are also size thresholds where the way you have been running the firm stops working. The first happens when a staff goes from six or eight people to 14 or 15. As firm principal, you can no longer manage everyone directly, and the systems that lived in your head must live on paper or through other team members teaching the systems.
The next breaking point happens around 23 to 25 people, where leadership requires managing managers, and a company’s culture has to be carried by people other than you. Each jump is roughly a doubling, and each one calls for a different operating structure than what came before. Firms that move smoothly through the first transition often stall at the second, because they assume what worked at 15 will scale to 25. It rarely does.
Build onboarding that’s scalable
The solution to these growing pains is less glamorous than the growth itself. You must implement a defined onboarding process that runs across each new hire’s first two weeks, then their full first year. Here is the sequence I recommend to clients.
Pair every new hire with an internal mentor who is not their direct manager—a peer or seasoned team member whose job for the first 90 days is to answer the small questions nobody writes down—details like which vendor you use for what; how to handle a change order; or who to talk to when a client goes quiet. This is how the company’s systems transfer without pulling the principal into every question.
Structure the first two weeks deliberately. Map out who the new person meets, which systems they learn, and what they are expected to know by day 14. Then extend that arc through the first year with 30-, 60- and 90-day milestones, and quarterly checkpoints after that. Onboarding that ends after the first week is the most common reason new hires tell me they feel lost.
It’s also important to take a wide view: Lay out a growth plan so the employee can see their future at the firm. Where does this role lead? What earns a promotion, and on what timeline? People stay when they can picture themselves two years out. Without that picture, your strongest hires start taking recruiter calls within months.
Finally, an integral part of onboarding is sharing your cultural norms, values and vision out loud and in writing. Ask yourself a hard question: Could a new hire describe what your firm stands for without you in the room? If the answer is no, the culture lives only in your head.
Promote from within with the same rigor
When you move a designer into a lead role or a coordinator into operations, treat that transition like a new hire. The instinct is to skip the formal onboarding because the person already knows the firm. But they do not yet know the new role. Clarify the expectations, redefine their responsibilities in writing, and name what success looks like in the first 90 days. A good designer does not automatically become a good manager—that is a skill set you must teach, the same way you would teach an outside hire.
Meet with your team weekly, without exception
Growth isn’t manageable without a leadership cadence. During rapid growth, leaders need a regular, predictable rhythm of meeting with their people—weekly is the standard I push clients toward. A consistent 15 or 20 minutes a week catches the small problems before they become resignations, and it signals that connection is built into how the firm runs, even when everyone is busy. The firms that lose their culture during growth are usually the ones where the founder pulled back right when the team needed them most.
Best practices for leaders in rapid growth
To review, here are the most essential points to keep in mind when onboarding:
- Add no more than two people at a time unless you have onboarding capacity planned and a team to assist with the training.
- Document the company’s way, so your knowledge becomes the firm’s knowledge.
- Assign a mentor to every new hire for their first 90 days.
- Run a structured onboarding arc—a deliberate first two weeks, then 30-, 60- and 90-day milestones across the first year, with quarterly checkpoints.
- Give every employee a visible growth path so they can see their future with you.
- Onboard internal promotions with the same clarity you give outside hires.
- Hold weekly check-ins with your team, and protect that time as the pace picks up.
- Plan what you will take off of your plate to make space for the training of the new hires.
Growth will test your culture, whether you prepare for it or not. The firms that come through that process intact build the onboarding, the mentorship, and the meeting rhythm before the hiring spree—so the culture is understood by all, not just the founder. Put those systems in place now, so you don’t have to press pause to do so right when your firm starts to build momentum.
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Gail Doby is co-founder of Pearl Collective (formerly Gail Doby Coaching & Consulting), an interior design business consultancy that helps designers, architects and other creatives increase their profitability. Doby ran her own design firm in Denver for nearly 20 years and has a degree in finance and banking. Since 2008, she has been helping designers scale their businesses profitably and reach financial freedom. As a coach, mentor and business transformation specialist, she shares innovative ways to overcome the roadblocks, challenges and detours creative entrepreneurs face. She is also the bestselling author of Business Breakthrough: Your Creative Value Blueprint to Get Paid What You’re Worth. Her goal is to empower design industry clients to differentiate themselves, drive measurable results, achieve business projections, and create personal satisfaction through game-changing strategies and business practices.
