A method of processing a hydrocarbon feed that is a middle distillates boiling in the range of 180°C to 400°C to remove undesired aromatic and non-aromatic organosulfur compounds, the method comprising: separating aromatic content of the hydrocarbon feed by subjecting the hydrocarbon feed and an effective quantity of extraction solvent to an extraction zone to produce an extract containing a major proportion of the aromatic content of the hydrocarbon feed and a portion of the extraction solvent and a raffinate containing a major proportion of the non-aromatic content of the hydrocarbon feed and a portion of the extraction solvent; wherein the extraction solvent is selected from the group consisting of furfural, N-methyl-2-pyrrolidone, dimethylformamide and dimethylsulfoxide; separating at least substantial portion of the extraction solvent from the raffinate and retaining an aromatic-lean fraction; separating at least substantial portion of the extraction solvent from the extract and retaining an aromatic-rich fraction; subjecting the aromatic-lean fraction to a hydrotreating process under mild operating conditions including a temperature of 300°C to 400°C, a hydrogen partial pressure of less than 55 bars, a feed rate of 0.5 hr -1 to 10 hr -1, and a hydrogen feed rate from 100 liters of hydrogen per liter of oil to 500 liters of hydrogen per liter of oil to thereby reduce the sulfur content; contacting the aromatic-rich fraction with an oxidizing agent, with a molar ratio of aqueous oxidizing agent to sulfur from 1:1 to 100:1, and an oxidizing catalyst to convert aromatic organosulfur compounds to oxides and produce an oxidized aromatic-rich fraction; wherein the oxidizing catalyst is selected from the group consisting of homogeneous catalysts and heterogeneous catalysts and includes a metal from Group IVB to Group VIIIB of the Periodic Table; decanting in a decanting vessel the aqueous oxidizing agent and oxidizing catalyst from the oxidized aromatic-rich fraction; separating oxides of aromatic organosulfur compounds from the oxidized aromatic-rich fraction by solvent counter-current extraction and adsorption in an adsorption column; combining the hydrotreated aromatic-lean fraction and the effluent from the adsorption column; and recovering an ultra-low sulfur level hydrocarbon product. separating aromatic content of the hydrocarbon feed by subjecting the hydrocarbon feed and an effective quantity of extraction solvent to an extraction zone to produce an extract containing a major proportion of the aromatic content of the hydrocarbon feed and a portion of the extraction solvent and a raffinate containing a major proportion of the non-aromatic content of the hydrocarbon feed and a portion of the extraction solvent; an extract containing a major proportion of the aromatic content of the hydrocarbon feed and a portion of the extraction solvent and a raffinate containing a major proportion of the non-aromatic content of the hydrocarbon feed and a portion of the extraction solvent; wherein the extraction solvent is selected from the group consisting of furfural, N-methyl-2-pyrrolidone, dimethylformamide and dimethylsulfoxide; separating at least substantial portion of the extraction solvent from the raffinate and retaining an aromatic-lean fraction; separating at least substantial portion of the extraction solvent from the extract and retaining an aromatic-rich fraction; subjecting the aromatic-lean fraction to a hydrotreating process under mild operating conditions including a temperature of 300°C to 400°C, a hydrogen partial pressure of less than 55 bars, a feed rate of 0.5 hr -1 to 10 hr -1, and a hydrogen feed rate from 100 liters of hydrogen per liter of oil to 500 liters of hydrogen per liter of oil to thereby reduce the sulfur content; contacting the aromatic-rich fraction with an oxidizing agent, with a molar ratio of aqueous oxidizing agent to sulfur from 1:1 to 100:1, and an oxidizing catalyst to convert aromatic organosulfur compounds to oxides and produce an oxidized aromatic-rich fraction; wherein the oxidizing catalyst is selected from the group consisting of homogeneous catalysts and heterogeneous catalysts and includes a metal from Group IVB to Group VIIIB of the Periodic Table; decanting in a decanting vessel the aqueous oxidizing agent and oxidizing catalyst from the oxidized aromatic-rich fraction; separating oxides of aromatic organosulfur compounds from the oxidized aromatic-rich fraction by solvent counter-current extraction and adsorption in an adsorption column; combining the hydrotreated aromatic-lean fraction and the effluent from the adsorption column; and recovering an ultra-low sulfur level hydrocarbon product.