Eagle Harbor Technologies (EHT) is developing high voltage nanosecond pulsers capable of driving nonlinear transmission lines for high power microwave production and generating non-equilibrium plasmas. Other applications for high voltage nanosecond pulsers include plasma medicine, material science, enhanced combustion, drag reduction, surface and water decontamination and Electromagnetic device testing. The EHT nanosecond pulser technology is capable of producing high voltage (up to 60 kV) pulses (width 20–500 ns) with fast rise times (< 20 ns) at high pulse repetition frequency (adjustable up to 100 kHz) for CW operation. EHT nanosecond pulsers allow the user to independently control the output voltage, pulse width, and pulse repetition frequency, enabling researchers to explore non-equilibrium plasmas or high power microwave sources over a wide range of parameters.