2Tim. 1.9
The word "God" at the end of the proceeding verse precipitated the next few words which become almost a doxology.
Who saved us .. Past tense, ref to what was accomplished at Calvary, or our initial obedience to the gospel.
Holy calling.. synonymouse to being saved. A calling to be holy.
Before times eternal.. the plan and the means of its accomplisment have existed eternally, not a reference to individual predestination.
The plan, grace, and the means, in Christ, were predestined. Men then who respond properly will be saved Revelation 22:17 Mark 16:16.