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| Date from | Date to | Event | Source |
|---|---|---|---|
| 1.11.1854 | Appointed Elève de Polytechnique | ref:673 | |
| 1.5.1856 | Appointed Elève du Génie Maritime | ref:673 | |
| 1.6.1858 | Appointed Sous-Ingénieur de Troisième Classe de la Marine | ref:673 | |
| bef.1.1.1860 | Appointed Adjoint de l'Etablissement d'Indret , Atelier de Construction de Machines at Indret | ref:673 | |
| 1.6.1860 | Appointed Sous-Ingénieur de Seconde et de Première Classe de la Marine same day ? | ref:673 | |
| 1867 | Jean Frot invented an "ammonia machine" , which was to replace the steam engine.He presented it at the Universal Exhibition of 1867 and it received an award .The Navy then decided to build 2 machines by the arsenals .But technical difficulties arose and the project came to an end ... | ref:673 | |
| bef.1.1.1869 | Appointed Adjoint à la Surveillance des Fournitures de Bois de la Marine dans le Bassin Forestier de la Loire at Orléans | ref:673 | |
| 1876 | Supervisor of the works of the Transatlantic Company of Saint Nazaire | ref:673 | |
| 16.5.1876 | Appointed Ingénieur des Constructions Navales de Seconde Classe | ref:673 | |
| bef.1.1.1881 | Appointed Chef à la Surveillance des Fournitures de Bois de la Marine dans le Bassin Forestier de la Loire at Angers | ref:673 |