The strengths that made your engineering company succeed with 5 employees can be the ones to make it fail at 50 if not managed properly. Don't get stuck in the mindset of continuing to do what worked to get you to where you are. As your company grows, so must your operations. I am both an engineer and an operations consultant, so I find solutions that are realistic for companies from both perspectives. Get in touch, the most dangerous thing you can do is assume you are doing everything right.
I am always interested in hearing from people interested in technology, engineering operations, or running their own business. I consider it vital to keep an open mind and to embrace being wrong as an opportunity to improve. I also love to hear from startups, VCs, or teams interested in speaking engagements.