Employee vs. Employer Contributions
One of the biggest issues in a 401(k) division is separating what the participant put in from what the company contributed. The Sk Siltron Css 401(k) Retirement Plan likely includes voluntary employee contributions (fully owned) and employer matching or profit-sharing contributions (subject to vesting).
General tip: QDROs should account for both fully vested and unvested funds. Unvested employer contributions may not be accessible to the non-employee spouse until certain employment conditions are met. Talk to your attorney or QDRO professional to make sure this is clearly defined in your order.

