SJL, Inc. :: Consulting Engineers & Surveyors SHAFFER, JOHNSTON, LICHTENWALTER & ASSOCIATES, INC. Consulting Engineers & Surveyors since 1952. Providing clients with quality Civil Engineering and Surveying solutions for expanding Counties, Cities, business and individuals in Ohio. Locations in Mansfield and Wooster Ohio. SJL, Inc. Sjl-inc.com~Site InfoWhoisTrace RouteRBL Check