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*1851 Assistant Engineer , ‘[[East Indian Railway]]’ (EIR) in charge of the ‘Chandernagore District Section’ which was under construction by Messrs Hunt, Bray and Emalie as contractors <ref name=ICESibley>[https://www.icevirtuallibrary.com/doi/pdf/10.1680/imotp.1892.20212 Institution of Civil Engineers - Obituary George Sibley, pages 409-411]; Retrieved 22 Dec 2020</ref>. * 1853 Resident Engineer, in charge of Beerbhoom District, where he designed , amongst others, the bridges over the [[East Indian Railway - Bridges and Tunnels|River Adjai and River More ''- see separate pages'']] <ref name=ICESibley/> * 1853 Promoted to EIR District Engineer*1857 Promoted to EIR Deputy Chief Engineer*1859 Chief Engineer of the North Wester Provinces Division, extending from the Kurrumnassa (Buxar) to Delhi<ref name=ICESibley/>*1859-65 Engineer-in-Charge of construction of the [[Naini Bridge]]over the River Jumna at Allahabad - *see Footnote*

*1868-76 Chief Engineer [[East Indian Railway]] on retirement of [[George Turnbull]] <ref>[https://ia801404.us.archive.org/16/items/historyeastindi00huddgoog/historyeastindi00huddgoog.pdf Archive.org "History of the East Indian Railway ..." by George Huddlestone Appendix A, page 277, pdf page 332]; Retrieved 9 Jun 2016</ref>. This covering the whole line (Howrah, opposite Calcutta, to Delhi and Allahabad to Jubbulpore, a length of 1512 miles) <ref name=ICESibley/>*1868-75 Member of ‘The Board of Agency’ for the EIR<ref name=ICESibley/>*1875 Left India on furlough*1876 Retiredfrom EIR

==Anecdotal ReferencesFootnote==

*'The bridge over the Jumna at Allahabad was opened for traffic on the 15th August, 1865. It had taken nearly 8 years to construct and its completion wm a subject for much congratulation ; it was the middle link in the long chain of unbroken communication established by the East Indian Railway, for the first time in the history of India, between the right bank of the Hooghly at Calcutta and the left bank of the Jumna at Delhi. Mr. Sibley, the Chief Engineer of the North-West Provinces and Messrs. Collett and Donne, the District and Assistant Engineers and the subordinate staff under them received the thanks of Government and the encomiums of the Board.' From the Institution of Civil Engineers Obituary<ref name=ICESibley/>*Mr Sibley completed the then longest railway bridge in the world over the River Jumna at Allahabad (named the ‘[[Naini Bridge]]’), the superstructure of 14 spans of 212 feet being designed by Messrs A.M. and G.W.Rendel and the foundations by Mr Edward Purser. This bridge has a railroad above and a carriage and footway below.*He also constructed the [[Jumna Bridge (Delhi)|‘Delhi Jumna Bridge’, 12 spans of 211 feet , he designing the foundations and the Messrs Rendel the superstructure* He designed all the works at Delhi, including those necessitated by passing through the Fort, the Selimghur Bridge and the handsome station