Calling scope from within another scope

Nested scope

  named_scope :job_titles, lambda { |ut| { :conditions => { :user_type => ut } }}
  named_scope :search_analysts, lambda { job_titles('Search Analyst') }
  named_scope :marketing_analysts, lambda { job_titles('Marketing Analyst') }
  named_scope :seo_specialists, lambda { job_titles('Link Specialist') }