Skip to main content

Johnson & Allen Ltd

Johnson & Allen Ltd operates in the magnetic particle and dye penetrant inspection industry.

Industrial Machinery Manufacturing
Explore the company ↓Explore its lists ↓
Headquarters
Sheffield, South Yorkshire, United KingdomSource: RevenueBaseRetrieved October 13, 2026
Employee range
11 to 50Source: RevenueBaseRetrieved October 13, 2026
Founded
1938Source: RevenueBaseRetrieved October 13, 2026
Published list appearances
8 supported appearances ↗Source: RevenueBase lists
The company at a glance

What does Johnson & Allen Ltd do?

The company designs and manufactures standard and bespoke non-destructive testing solutions. Its bespoke systems are designed and built in-house in Sheffield, UK.

Based on the company’s public LinkedIn information, supplied through RevenueBase.

Who it serves

The company supplies industries including aerospace, automotive, rail, oil and gas, military, and general engineering.

What the business offers

Services & capabilities.

Inspection services

The company operates in magnetic particle and dye penetrant inspection.

Source: LinkedIn company description · Retrieved October 13, 2026

Explore the business in context

Company lists.

Supported appearances on published RevenueBase lists, including available memberships beyond displayed rankings.

Positions describe ordering within each source list. See how lists are built ↗

Share your recognition

Embeddable award for your website

BADGE PREVIEWJohnson & Allen Ltd listed #3 on Electrical testing and inspection companies, September 18, 2026Open the published source list.
Johnson & Allen Ltd

#3 Electrical testing and inspection companies

Snapshot: September 18, 2026

Download SVG
View live list ↗

Company information

Sources & data notes.

RevenueBase prepared this profile from the company’s public LinkedIn information and RevenueBase company data. These source records were retrieved on October 13, 2026. AI helped summarize these sources, with a separate automated check against the source text completed on November 3, 2026. Directory positions use company-contact counts from separate saved list snapshots dated September 16, 2026, September 18, 2026, September 19, 2026 and September 29, 2026. How the company lists are built.

Help keep this profile accurate

Something changed?

Share a correction, your relationship to the company, and supporting sources. Requests are reviewed before changes are published.

Request an update ↗
Find your next account

One company is just the start.

Explore more companies by name, headquarters and business focus.

Explore company profiles →