Hi Jordan,
I would say turn your thinking around and look it in terms of positive attributes.
-
6 years would be a positive to an employer. It shows you don’t “jump around” and provided the work, pay, environment is good you will stick around at the new company
-
Explain you were promoted quickly and given additional responsibility - shows your current employer saw potential in you and valued your work.
-
Maybe explain you have reached the top level at that company or learning or growing has stalled and you are ready for a new challenge.
-
If the company is looking for somebody with experience in multiple companies in short time frame then you can’t compete no matter what you do. If that’s common in the industry then you better get moving. Take a lower position/salary and gain the right experience.
Be true and honest to yourself. Portray that to the new employers and hope that it aligns with what they are looking for. If you try to spin your situation to match “the industry standard” you may be changing it often not knowing what they are really looking for. Play up your attributes and don’t focus what you perceive as being lacking in.
Good luck.