Wiszniewski was born in Glasgow. He studied architecture at the Mackintosh School of Architecture, then attended Glasgow School of Art from 1979 to 1983. He belonged to the group of Glasgow-based artists who led a revival of figurative painting in Scottish art during the 1980s. In Wiszniewski's early work, the artist created densely patterned picture surfaces, covered with marks and squiggles. Later this gave way to the use of a plainer background. However the same dreamy, awkward-looking young men still appeared in his paintings. His work lies within the poetic, romantic tradition of British art.