For Harry Dresden the symbol of magic is a pentagram representing the 5 fundamental forces (fire, air, earth, water and spirt) contained by human will.  The thing is those forces are what alchemists used to think were fundamental.  However the latest in (more) fundamental forces in physics today are The Strong nuclear Force, The Electromagnetic Force, The Weak nuclear Force and gravity.  Suppose you had a wizard who was raised from a tradition of physics instead of alchemy.  What could you do with refinement in those forces?  Also what should the symbol look like?

Also I want to mention I have no intention of making this a techo wizard.  It still hexs.  In fact the hexs might be worst because they involve small disruptions in the fundamental forces around him caused by unformed intentions.  Harry only seems to cause disruptions in the Electromagnetic Force.