LHS Specifications GmbH (LHS) was founded in 1990 in Germany from a group of former IBM managers – amongst them Hartmut Lademacher as the founding CEO.

LHS entered the market with a self-developed software that provided a billing and customer care system (BSCS). In the fast moving mobile communication market LHS grew rapidly together with its industry and customers.

In 1995 all worldwide LHS activities were bundled under the roof of LHS Group Inc., Atlanta GA, USA.

In 1997 LHS Group Inc. went public at Nasdaq and later – in a secondary listing – at Neuer Markt, Germany.

In 2000 Sema acquired LHS Group Inc.

In 2001 Sema was taken over by Schlumberger. In subsequence the entity was renamed to SchlumbergerSema

In 2003 Schlumberger took the strategic decision to divest from all sectors except their core business, oil field services and equipment. During this process their telecom business, SchlumbergerSema, was separated into a product house and the system integration business.

In 2004 LHS Acquisition GmbH - an investment company owned by Hartmut Lademacher and General Atlantic, LLC both amongst the original share holders of LHS Group Inc. - acquired the product house.
LHS Group was re-established as an independent company and since then has experienced rapid growth in all divisions in order to fulfill market demands.

In August 2006, LHS was converted to a stock corporation and went public in October 2006 on the German Prime Standard.