sloppy power transistor waveform

I am using a 2N3055 power transistor as a switch. With a simple 555 timer trigger with very clean square wave outputs, the power transistors output is sloppy to say the least. Is this typical?
I’m going to attempt to pulse high voltage DC (2k-20kvdc) and have written a PIC program which gives very clean square wave pulses from 150khz down to 2hz. My trigger signal is about 4-5vdc. Is there a better way to do this?
The images are examples of the 555 output and crude drawing of the 2n3055 output on an oscilloscope. Also attached should be the circuit used to test the power transistor.

Is the Oscpoe terminated with 50 Ohms or 1Megohms?
For TTL you need a high impedance load. If that doesn't help
put a cap across the Load/Oscope.

First of all, what kind of load is the 2N3055 driving?

Element_115 got me on track. I just measured my scope and it's 1 meg. (learn something new every day

I'm driving a flyback primary (one is 1ohm and the other is .7). Things work fine, but I couldn't understand why the waveform looked sloppy. I was viewing it via just the scope and no load. Making some changes to components, the waveform is now cleaner, although it spikes high in the beginning, then slopes a bit before dropping to 0. Still not clean, but obviously good enough for the circuit.

What I want to do is replace the 555 oscillator wth my PIC square wave generator to give me control over the 2N3055 output through the microprocessor. I need to experiment a bit to get the power output side a bit cleaner.
Thanks for the help.