Some of the largest oilfield service companies around the globe rely on Kalyn Siebert to build pressure-pumping-related chassis trailers. In alliance with the Heil Trailer International Oil & Gas division, Kalyn is also integrating complete pressure pumping products in Gatesville including frac pumpers, blenders, cementers and gel hydration units, built to their customers’ specifications or Heil Trailer Oil and Gas proprietary designs.