Julio Sierra
👤Spain referee observer · 1 competition
Julio Sierra is a Spain football referee observer. They have officiated as observer. In total they have 1 tracked match appearances across 1 competition, broken down as 1× Observer. Most-worked competitions include Primera Federación. This profile is built from official match-appointment data.
Top Competitions
Season-by-Season Activity
| Season | Total | Obs. |
|---|---|---|
| 2026/27 | 1 | 1 |
Career Milestones
Career-firsts tracked in our database.
Match Activity
1 match · 1 yearPeer Benchmark
Median in Spain: 5 matches · 1 season
Most-Officiated Teams
Least-Officiated Teams
Clubs in their current competition, ordered by how seldom this official has worked their matches.
Each number = matches officiated involving that club · 0× = never officiated them
Other officials from Spain
Career Events
Career events (UEFA courses, awards) will appear here when available.
Season Reports
Rarely Works With
Active officials in Primera Federación they have shared fewest matches with.
- 1Jose MartinezAssistant Referee 2 · 8 in leagueNever
- 2Daniel J. PratAssistant Referee 1 · 6 in leagueNever
- 3Iván GagoAssistant Referee 2 · 6 in leagueNever
- 4Adrián DolzAssistant Referee 1 · 5 in leagueNever
- 5Antonio LunaAssistant Referee 2 · 5 in leagueNever
- 6Álvaro Cánovas García-VillarrubiaReferee · 5 in leagueNever
- 7Alfredo RamosReferee · 5 in leagueNever
- 8Bruno RodríguezAssistant Referee 2 · 5 in leagueNever
Explore the full officiating network — partnerships, observers, clubs and venues — on the network analysis page.
Frequently Asked Questions
What is Julio Sierra's primary role?▾
Julio Sierra is a Spain football referee observer.
How many matches has Julio Sierra officiated?▾
Julio Sierra has 1 tracked match appearances across 1 competition (1× Observer).
Which competitions does Julio Sierra work in?▾
Julio Sierra has most often officiated in Primera Federación.
Is Julio Sierra a FIFA referee?▾
Julio Sierra is not currently recorded as a FIFA badge holder in our data.
Which teams has Julio Sierra officiated most?▾
Among domestic clubs, Julio Sierra has most frequently officiated matches involving Real Zaragoza and CE Europa.
Organizer reviews
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<a href="https://www.referee.observer/referee/esp/julio-sierra" title="Julio Sierra — referee statistics on Referee.Observer">Julio Sierra — referee profile & stats on Referee.Observer</a>Referee.Observer is built by a community of referees from open, public data sources — so some details may be out of date or wrong.