I'm getting duplicates in the SSNID column. Need assistance.

SELECT distinct 

dsp.SSNID,
Case When fsa.Assigned_CNT>0 and 
    dsp.rcms_Grade_CD in('E4','E5','E6','E7','E8') and
    fsp.Promotable_CNT = 1 and dpc.InPositionOfHigherGrade_YN = 1 
    and dsp.rcms_ComponentCategory_CD <> 'AGR'
    and dsp.APFT_Result_CD <> 'F'
    and qcsp.SFPA_CNT = 0 
    and qcsp.SFPA_Adverse_CNT =0
    Then fsa.Assigned_CNT Else 0 End as 'EnlistedPromotionEligible'
, Case When fsa.Assigned_CNT>0 and 
    dsp.rcms_Grade_CD in ('O1','O2','O3','O4') and
    fsp.Promotable_CNT = 1 and dpc.InPositionOfHigherGrade_YN = 1 and 
    (fps.fr_Packet_CNT < 1 or fps.fr_Packet_CNT is null)
    and dsp.rcms_ComponentCategory_CD <> 'AGR'
    and dsp.APFT_Result_CD <> 'F'
    and qcsp.SFPA_CNT = 0 
    and qcsp.SFPA_Adverse_CNT =0
    Then fsa.Assigned_CNT Else 0 End as 'OfficerPromotionEligible'
,dsp.rcms_Grade_CD
,dp.rcms_PositionGrade_CD
, 'InHigherPos' =Case When dp.rcms_PositionGrade_CD is null Then 0 When dp.rcms_PositionGrade_CD > fsa.rcms_Grade_CD Then 1 Else 0 End
,fps.fr_Packet_CNT
,dsp.APFT_Result_CD
,dsp.rcms_ComponentCategory_CD
,dpc.InPositionOfHigherGrade_YN as 'PromoReqInPositionOfHigherGrade_YN'
,dpc.ReqCollegeDegree_YN
,fsp.MeetsCollegeReq_CNT
,dpc.ReqMilitaryEducation
,mil.Code as 'MilitaryEducation_CD'
,rcms_MilitaryEducation_Desc
,fsp.MeetsMILEDReq_CNT
,dpc.ReqMonthsInGrade
,'Months in grade' = floor((datediff(dd,dsp.rcms_Rank_DT, fsp.Run_DT)+1)/30.42)
,fsp.MeetsMoInGradeReq_CNT
,dpc.ReqMonthsInService
,'Months in service' = floor((datediff(dd,dsp.rcms_PEBD_DT, fsp.Run_DT)+1)/30.42)
,fsp.MeetsMoInServiceReq_CNT

FROM [G1Lifecycle_DW].[dbo].FactStrengthAssessment fsa
JOIN G1LifeCycle_DW..DimSoldierPersonnel DSP on DSP.ID = FSA.SoldierID and FSA.Run_DT >= dsp.Start_DT and (fsa.Run_DT < dsp.End_DT or dsp.End_DT is null)
JOIN [G1Lifecycle_DW].[dbo].[FactSoldierPromotability] fsp on fsp.SoldierID = fsa.SoldierID
JOIN [G1Lifecycle_DW].[dbo].[DimPromotionCriteria] dpc on dpc.ID= fsp.PromotionCriteriaID
JOIN [G1Lifecycle_DW].[dbo].[DimPosition] DP on DP.ID = fsa.PositionID
LEFT JOIN [G1Lifecycle_DW].[dbo].[FactFedRecPacketStatus] fps on fps.ssnid = DSP.ssnid
left join G1Lifecycle_LOOKUPS.dbo.Lkp_MilitaryEducation_CD mil on DSP.MilitaryEducation_CD=mil.Code and mil.End_DT is null
JOIN [G1Lifecycle_DW].[dbo].[QQRCurrentSoldierPASS] QCSP on qcsp.SSNID=dsp.SSNID
WHERE 

dsp.rcms_Grade_CD in('E4','E5','E6','E7','E8', 'O1','O2','O3','O4') and

dsp.End_DT is null