Joshua Thigpen, who worked at SWK Technologies since August 2013, has returned to Nextec where he worked from May 2005 through August 2013. Thigpen is the latest in a series of personnel changes at Livingston, N.J.-based SWK since former CEO Jeff Roth left in February. He was SVP at SWK from August 2013 through October 2015 and EVP of SWK from October 2015 through last month.