Employee vs. Employer Contributions
Employee contributions are generally 100% vested immediately. In contrast, employer contributions may be subject to a vesting schedule. If the participant hasn’t worked long enough, some of the employer match may be unvested and therefore not eligible for division.
Your QDRO should clearly spell out whether only vested funds are being divided or whether it includes future vesting. Most plans, including corporate-sponsored ones like this, only divide vested balances unless otherwise specified.

