- Marshall, John
- Author of “Biographical Dictionary of Railway Engineers” 2nd Edition Pubished by Railway & Canal Historical Society, 2000, ISBN 0-9014641-22-9.
- McConnell, James Edward (1815—1883)
- Locomotive Superintendent of LNWR Southern Division from 1847—1862. Oversaw the design of Bloomer and Patent locomotives.
- Moon, Sir Richard (1814—1899)
- The was elected to the LNWR Board in 1851 and within a year became most active in the company’s affairs. He was made Chairman in 1861 and for the next 30 years directed all his activities to the LNWR.
- Moorsom, Captain Constantine Richard (1792—1861)
- From 1833 became joint secretary of the Birmingham & Gloucester Railway where his younger brother Captain W.S. Moorsom was Engineer. Elected to the Board in 1841 and within 2 week became chairman. Resigned December 1843 just before the BGR became part of the MR.
He was also joint secretary of the LBR 1837-9.
Later he became a director of the LNWR and chairman in October 1852
- Moorsom, Captain William Scarth (1804—1863)
- In 1836 was appointed to survey the Birmingham & Gloucester Railway, which included the Lickey incline 2 miles at 1 in 37.
Among his other railway work he was Engineer on the Cromford & High Peak Railway .
- Nock, Oswald Stevens (1905—1994)
- Professional signal engineer and prolific writer on locomotives and railways generally. Author of over 100 railway books. See also “Practice and Performance”
- Ramsbottom, John (1814—1897)
- Locomotive superintendent on the Manchester & Birmingham (1842-46), of the NE division of the LNWR (1846-57) and of the LNWR (1857-71). Inventor of the Ramsbottom-type safety valve, and pioneer of water pick-up troughs.
- Riddles, Robert Arthur (1892—1983)
- Chief Mechanical Engineer for British Railways (1948–1953). Originally trained at Crewe under the London North Western Railway, he then worked on the London Midland and Scottish Railway before being put in charge of locomotives at the Ministry of Supply during WW2.
- Saxby, John (1821—1913)
- Inventor of interlocking points and signalling, patented 1856 and first used on the LBSCR. His company, Saxby and Farmer, provided many of the earliest signal boxes on the LNWR, some of which are still in use.
- Scott, Samuel Strong (1858—1934)
- Sammy Scott started work as a booking clerk at stations in the Stockport area, 1872. Later as a main-line Guard on the LNWR circa 1920 he gathered information on early locomotives, becoming a leading authority on the subject.
- Stanier, Sir William (1876—1965)
- Chief Mechanical Engineer at Crewe Works for London, Midland & Scottish Railway (1932–1944).
- Stephenson, George (1781—1848)
- British steam pioneer and mining engineer, designer of the miner’s safety lamp and mining engines. Later, the engineer of the Hetton Colliery, Stockton & Darlington, Liverpool & Manchester, Leicester & Swannington, Birmingham & Derby, North Midland and Manchester & Leeds Railways between 1819 and 1840. Established an engineering works in Newcastle in 1823, Robert Stephenson & Co.
- Stephenson, Robert (1803—1859)
- Son of George, Railway engineer. Designed the “Rocket”, winner of the Rainhill prize in 1829. Engineer of the London & Birmingham Railway, and designer of numerous bridges, including the Britannia bridge over the Menai Strait and the high-level bridge at Newcastle-upon-Tyne.
- Stevenson, Francis (1827—1902)
- Engineer on London & Birmingham railway. 1843 became manager of engineering staff. 1886 appointed Chief Engineer of the LNWR. Stevenson was a lover of nature and of old buildings and always strove to blend his works into the landscape.