Startup transient when using a bipolar opamp as a DAC voltage reference
Without seeing your power supply turn-on and turn-off behavior, there is simply no way to be sure how it will behave on power-on.
However, if you're worried about negative excursions, you have a simple way out. Connect the V- input to ground, rather than -15. You're not trying for a bipolar excursion, after all, but rather a constant 3.3 volts.
Check the data sheet figures 2 and 3, and you'll see that even for a 2 k load, the output will get within 2 volts of the supplies. For a 15 volt supply, this is a range of about 2 to 13 volts. Since you need 3, you should be all set. Actually, you're even better off than the data sheet indicates, since the op amp will be sourcing current at the lower ouput voltages, and the NPN portion of the output stage will be doing the work, and will have 12 volts across it, so there is no chance of the output stage getting starved.
EDIT - There is a way to check for transients without a scope, but it will take a bit of extra circuitry, and one or more power supplies. If you make a comparator combined with an SR flip-flop,



simulate this circuit &ndash; Schematic created using CircuitLab
Use the pot to set your trigger voltage, and close the switch momentarily to reset the flip-flop. The circuit must be live before you turn on the circuit you're testing. If the input drops below the set point, even for a few microseconds, the LED will turn on and stay on until the reset switch is pressed.
The CD4011 is powered by +15 and GND, not +/- 15.