'Turn a company structure string into a table hierarchy

Is it possible to turn a company structure string into table hierarchy?
boss/manager_1/manager_2/manager_3/employee

For example:

enter image description here

I've got this far but I'm stumped

WITH one AS (
             SELECT SPLIT(company_structure, '/') AS employees
             FROM t1 ),
two AS ( 
SELECT employees[1] as Level_1,
       employees[2] as Level_2,
       employees[3] as Level_3,
       employees[4] as Level_4
)
SELECT * FROM two


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