Custom Order by

In the following query, I order the output based upon Agency at the end.  The problem though is that one of the agencies in the list needs to always be listed at the bottom after all the other agencies are listed in alphabetical order.  Is there any way to accomplish that in SQL?

With CTE_Hours as (select distinct H.AgencyID, H.Agency,H.Hours, isnull(H.Classification,'') Classification, isnull(H.Objectives,'') Objectives,H.ActivityType,H.ActivityOther, H.Narrative,H.Outcome,H.Duration,H.Frequency,H.Strategy,H.Need,H.NeedOther, H.ActivityID, H.RegID , R.AgeCurrent, R.CommunityCommittee, R.YouthCommittee, R.Parentcheck, R.CommunityResident, R.Race, R.Gender, R.Sector , cast(H.ActivityDate as Date) ActivityDate, H.Fiscal from tblOrgHours H inner join tblOrgRegistrations R on H.Regid = R.RegID and R.AgeCurrent between 0 and 99 Where 
 (H.Agency = 'Administrator' OR H.Agency = 'Chicago Area Project -')  And H.Fiscal = 2019 And H.ActivityDate >= '07/01/2018' And H.ActivityDate < '12/31/2018' And R.RegDate >= '07/01/2018' And R.RegDate < '12/31/2018') select  H.Agency ,A.ActivityName ,H.Classification ,H.ActivityDate ,H.Objectives ,H.Hours ,count(A.ActivityName) over (partition by H.Agency,A.ActivityName) as [ActivityCount] ,Count(H.RegID) as [# individuals] ,H.[ActivityType],H.ActivityOther,H.Narrative,H.Outcome,H.Duration,H.Frequency,H.Strategy,H.Need,H.NeedOther ,COUNT(CASE when R.CommunityCommittee = '1' then 1 end) as [CommunityCommittee]
,COUNT(CASE when R.YouthCommittee = '1' then 1 end) as [YouthCommittee] ,COUNT(CASE when R.Parentcheck = '1' then 1 end) as [Parentcheck] ,COUNT(CASE when R.CommunityResident = '1' then 1 end) as [CommunityResident] ,COUNT(CASE when R.Sector = 'Business' then 1 end) as [Business] ,COUNT(CASE when R.Sector = 'Civic-Volunteer' then 1 end) as [Civic-Volunteer] ,COUNT(CASE when R.Sector = 'Community Resident' then 1 end) as [Community Resident] ,COUNT(CASE when R.Sector = 'Faith Based' then 1 end) as [Faith Based] ,COUNT(CASE when R.Sector = 'Healthcare' then 1 end) as [Healthcare]
,COUNT(CASE when R.Sector = 'Human Support Agencies' then 1 end) as [Human Support Agencies] ,COUNT(CASE when R.Sector = 'Law Enforcement' then 1 end) as [Law Enforcement] ,COUNT(CASE when R.Sector = 'Local Government' then 1 end) as [Local Government] ,COUNT(CASE when R.Sector = 'Media' then 1 end) as [Media] ,COUNT(CASE when R.Sector = 'Parent or Guardian' then 1 end) as [Parent or Guardian] ,COUNT(CASE when R.Sector = 'Philanthropic' then 1 end) as [Philanthropic] ,COUNT(CASE when R.Sector = 'Schools' then 1 end) as [Schools] ,COUNT(CASE when R.Sector = 'Youth' then 1 end) as [Youth]
 from CTE_Hours H inner join tblOrgRegistrations R on H.Regid = R.RegID inner join tblOrgActivities A on H.ActivityID = A.ActivityID group by H.Agency,H.Classification,H.Hours, A.ActivityName,H.ActivityDate, H.Objectives,H.ActivityType,H.ActivityOther,H.Narrative,H.Outcome,H.Duration,H.Frequency,H.Strategy,H.Need,H.NeedOther Order by H.Agency