Somehow silos were forming when I thought we'd been active in preventing them

We were having a team dinner, there are now 40 people, and as I looked around, I realized I don’t know all of them that well. I noticed people were seated with others from their departments. Sales people were with sales people, ops with ops, etc. I realized I had a problem on my hands; the company was already breaking into silos.

We always valued collaboration and saw it a part of our culture and differentiation. But I could see this slipping away. Where had I gone wrong?

When someone joined the company, they worked in each department and we had open meetings with everyone in the company. When possible, we had multi-departmental teams working on projects. What else could I do? If I failed to act now, the problem would get even worse.