SIC code 71122 (Engineering related scientific and technical consulting activities) is one of the most widely used business classifications in the UK, with 21,816 active companies registered under this code. It falls under Section M (Professional, scientific and technical activities) of the UK SIC 2007 classification system. The average company age is 6.4 years.
See the full industry analysis on the Engineering related scientific and technical consulting activities industry page.
SIC code 71122 stands for "Engineering related scientific and technical consulting activities" under the UK Standard Industrial Classification (SIC 2007) system. It belongs to Section M — Professional, scientific and technical activities. Companies use this code when registering with Companies House to indicate their primary business activity.
There are currently 21,816 active companies registered under SIC code 71122 in the UK, out of 23,849 total registrations (including dissolved companies).
The top locations for companies classified under SIC 71122 are: ABERDEEN (342). These areas represent the highest concentration of engineering related scientific and technical consulting activities businesses in the UK.
Search, filter, and analyse 21,816 companies classified under this SIC code with AI-powered risk intelligence.
Data sourced from Companies House, HM Land Registry, FCA Register, and 50+ government databases. SIC classification follows the UK Standard Industrial Classification of Economic Activities 2007 (SIC 2007). Last updated: 2026-04-05.