Lyncole Industries, Inc.
lyncole industries, inc designs, manufactures, and installs the originally patented xit grounding system.
http://www.lyncole.com/

Kumwell Lightning Technology
Manufacturer and distributor of high quality Exothermic Welding process connections for Electrical, Railway Signaling, Cathodic Protection, including grounding and Lightning Protection, compliance to international standard IEEE,NEMA, IEC,etc. which many reference.
http://www.kumwell.com

CDEGS Grounding and Earthing Analysis
Complex grounding and earthing design, electromagnetic compatibility, interference analysis and lightning and surge studys
http://www.sestech.com

Omega Red Group Ltd
Omega Red Group is the UK market leader in Earthing and Lightning Protection. With branches in Edinburgh, Manchester, Nottingham, Bristol and London, the company handles major projects across the country for the construction, rail, power, telecoms and water sectors. From an initial survey to design and installation and through to ongoing testing and maintenance, Omega provides a comprehensive service that protects sites from lightning strikes, dangerous voltages and electrical surges.
http://www.omegaredgroup.com

UFER grounding system
A really novel grounding system.
http://www.scott-inc.com/html/ufer.htm

Anji Keling Magnetic Material Co., Ltd
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http://www.cnkeling.com

SAE Inc.
Specializes in the engineering, supply and installation of grounding systems.
http://www.saeinc.com

Alltec Corporation
Lightning protection, Grounding, and Transient Voltage Surge Suppression company that manufactures, installs, and designs lightning protection, grounding, and transient voltage surge suppression equipment and designs
http://www.allteccorp.com/

Alltec Corp.
A manufacturer of lightning protection and grounding systems.
http://www.allteccorp.com/index.html

WR Block and Associates, Inc.
WR Block provides consulting services to the communications industry for lightning protection and grounding; and is a PolyPhaser and ICT distributor of dc power supplies.
http://wrblock.com