we requested that the electricians put a 240V drop in the lab area with a L6-30R receptacle... When I checked the voltage at the outlet, I found 208V phase to phase and 120V phase to ground, so it looks like they connected two phases of our three phase supply to the hot terminals.
sigh the electricians should have had a conversation with you about that.
When an electric service is provisioned, you generally get power company's choice of either 120/240V split-phase, or 120/208V 3-phase "wye". This is built into the delivery transformers, and there isn't really anything you can do about it.
It is standard that so-called "240V" outlets -- NEMA 6 and NEMA 14 - are wired with 2 of the hot phases available, giving 240V in split-phase territory, and 208V in 3-phase territory. Most appliances are dual-rated for both voltages. (heat making appliances simply run 25% less heat.)
we normally run our systems off of 2 120V, 30A circuits
That should never, ever be done. No plug-and-socket connections should be used to merge two 120V circuits: these are called "suicide cords" - permitting these in a company is negligence ask your insurance company whether they will pay out for accidents involving them. The unplugged plug is dangerous in all modes and cannot be made safe.
Hard-wiring two 120V/30A circuits off 2 breakers should not be done either. Such a load needs, at the very least, a handle-tie between those breakers. And since it is development/testing equipment, it should be a 2-pole breaker which assures common trip, de-energizing the entire machine if one leg overloads. And for personnel protection it should really be a GFCI. (it is obviously not GFCI if you are feeding from two breakers).
My company builds electrical systems that are sold around the world...... the idea being that we could plug in transformers as needed to give us high current 120V or 220V single-phase to test systems designed for one or the other.
Aside from most countries having 50 Hz power (I don't know if that's concern to your equipment)...
The main thing is that all countries with 220V-240V power (except parts of Brazil and the Philippines) have neutral at the same voltage as safety ground. That means for instance that the Line phase is 230V from neutral, not 120V.
Really, to simulate world 220V-240V power, you should be using a step-up/down transformer, or an isolation transformer in boost mode, to increase your 120V supply up to 220V -- but holding neutral and ground at as-supplied from your panel. Such a configuration will also help the GFCIs in your panel protect your staff.
However if you want 30A @ 230V, you will need to start with 60A @ 120V. There is no such thing as a 60A /120V GFCI, so a 60A/240V GFCI would have to be used, with only one hot leg placed in use (unless you needed to test two rigs at once).
You will find a great deal easier time finding step-up transformers, or 120V/120V isolation transformers that can be configured to boost.