SWA Ltd Company Profile. SWA Ltd is a specialist Information Security Service Provider with over 50 years experience in providing Information Security services. BS7799 and CLAS advice o SWA Ltd employ CLAS Advisers, who are among the top 200 government advisers in the UK. o SWA Ltd employ BS7799 Lead Auditors. Technical Audit o All SWA Ltd Penetration Testers are highly skilled and hold current security clearances. Security Training o SWA Ltd offer training services to all staff levels, from Board members, Network Managers, and IT Managers to administration staff.