Join two SQL select statements and get both results in to single

I want to join these two SQL select statements and get both results as a single result.

--1st select statement
SELECT TA.DevID, TA.Task, TA.AssignDate,  TA.DevStart,TA.TaskType, TA.EstimateTime, TA.Status, TA.DevFinish, TAKPI.actAsignTime,  TAKPI.actTime, TAKPI.KPI
FROM TT_TaskAssign TA
INNER JOIN HR_EmployeeMaster1 EM
on TA.DevID=EM.EmpNo 
INNER JOIN dbo.TT_TaskAsignKPI TAKPI
ON TAKPI.AssignID = TA.AssignID 
WHERE TA.DevID='1435'

--2nd select statement
SELECT  TT_TaskAssign.DevID AS DevID  ,HR_EmployeeMaster1.EmpFirstName+' '+HR_EmployeeMaster1.EmpMiddleName+' '+HR_EmployeeMaster1.EmpLastName as Developer, SUM( CASE WHEN TT_TaskAssign.Status='Done' THEN 1 ELSE 0 END ) as DoneProjects , SUM( CASE WHEN TT_TaskAssign.Status='Developing' THEN 1 ELSE 0 END ) as DevelopingPrjects, SUM( CASE WHEN TT_TaskAssign.Status='Assign' THEN 1 ELSE 0 END ) as AssignedPending, SUM(CONVERT(int, TAKPI.KPINum)) AS KPINum 
FROM TT_TaskAssign inner join Project_Master on TT_TaskAssign.ProID=Project_Master.Project_Code Inner Join HR_EmployeeMaster1 on TT_TaskAssign.DevID=HR_EmployeeMaster1.EmpNo INNER JOIN dbo.TT_TaskAsignKPI TAKPI ON TAKPI.AssignID = TAKPI.AssignID
WHERE TT_TaskAssign.DevID='1435'
GROUP BY  TT_TaskAssign.DevID,HR_EmployeeMaster1.EmpFirstName+' '+HR_EmployeeMaster1.EmpMiddleName+' '+HR_EmployeeMaster1.EmpLastName
ORDER BY SUM(CONVERT(int, TAKPI.KPINum)) DESC

I did it in follwing way

SELECT T1.*, T2.*
FROM 
  (SELECT TA.DevID, TA.Task, TA.AssignDate,  TA.DevStart,TA.TaskType, TA.EstimateTime, TA.Status, TA.DevFinish, TAKPI.actAsignTime,  TAKPI.actTime, TAKPI.KPI
  FROM TT_TaskAssign TA
  INNER JOIN HR_EmployeeMaster1 EM
  on TA.DevID=EM.EmpNo 
  INNER JOIN dbo.TT_TaskAsignKPI TAKPI
  ON TAKPI.AssignID = TA.AssignID 
  WHERE TA.DevID='1435') T1

INNER JOIN
  (SELECT  TT_TaskAssign.DevID AS DevID  ,HR_EmployeeMaster1.EmpFirstName+' '+HR_EmployeeMaster1.EmpMiddleName+' '+HR_EmployeeMaster1.EmpLastName as Developer, SUM( CASE WHEN TT_TaskAssign.Status='Done' THEN 1 ELSE 0 END ) as DoneProjects , SUM( CASE WHEN TT_TaskAssign.Status='Developing' THEN 1 ELSE 0 END ) as DevelopingPrjects, SUM( CASE WHEN TT_TaskAssign.Status='Assign' THEN 1 ELSE 0 END ) as AssignedPending, SUM(CONVERT(int, TAKPI.KPINum)) AS KPINum 
   FROM TT_TaskAssign inner join Project_Master on TT_TaskAssign.ProID=Project_Master.Project_Code Inner Join HR_EmployeeMaster1 on TT_TaskAssign.DevID=HR_EmployeeMaster1.EmpNo INNER JOIN dbo.TT_TaskAsignKPI TAKPI ON TAKPI.AssignID = TAKPI.AssignID
  WHERE TT_TaskAssign.DevID='1435'
  GROUP BY  TT_TaskAssign.DevID,HR_EmployeeMaster1.EmpFirstName+' '+HR_EmployeeMaster1.EmpMiddleName+' '+HR_EmployeeMaster1.EmpLastName
  ORDER BY SUM(CONVERT(int, TAKPI.KPINum)) DESC) T2

ON T1.DevID=T2.DevID 

Now It's giving following error

    Msg 1033, Level 15, State 1, Line 17 
    The ORDER BY clause is invalid in views, inline functions, derived tables, subqueries, and common table expressions, unless TOP or FOR XML is also specified.

Please somebody help me to fix this error