[{"employeeId":"16a596ae-edd3-4847-99fe-c4518e82c86f","firstName":"John","lastName":"Lennon","position":"Development Manager","department":"Engineering","directReports":[{"employeeId":"b7839309-3348-463b-a7e3-5de1c168beb3"},{"employeeId":"03aa1462-ffa9-4978-901b-7c001562cf6f"}]},{"employeeId":"b7839309-3348-463b-a7e3-5de1c168beb3","firstName":"Paul","lastName":"McCartney","position":"Developer I","department":"Engineering"},{"employeeId":"03aa1462-ffa9-4978-901b-7c001562cf6f","firstName":"Ringo","lastName":"Starr","position":"Developer V","department":"Engineering","directReports":[{"employeeId":"62c1084e-6e34-4630-93fd-9153afb65309"},{"employeeId":"c0c2293d-16bd-4603-8e08-638a9d18b22c"}]},{"employeeId":"62c1084e-6e34-4630-93fd-9153afb65309","firstName":"Pete","lastName":"Best","position":"Developer II","department":"Engineering"},{"employeeId":"c0c2293d-16bd-4603-8e08-638a9d18b22c","firstName":"George","lastName":"Harrison","position":"Developer III","department":"Engineering"}]

db.collection.aggregate([{$match:{"employeeId":"16a596ae-edd3-4847-99fe-c4518e82c86f"}},{$graphLookup:{from:"collection",startWith:"$directReports.employeeId",connectFromField:"directReports.employeeId",connectToField:"employeeId",as:"allReports"}},])