The database of public procurement
Company
SIA GmbH
SIA GmbH from Alzey has been awarded 33 public contracts since 2006, 29 of them EU-wide up to 2023 (as of 21 Oct 2026).
As of: · Source: official notices (Datenservice Öffentlicher Einkauf, CC0), EU Official Journal (TED) and procurement portals · How we count
Awards per year, 2006 to today
Up to 2023 from the EU Official Journal (only contracts above the EU thresholds), from 2024 from the Datenservice Öffentlicher Einkauf and the portals. 2025: €64,639. The current year is incomplete.
Timeline, 36 months
One dot per award in the month of the notice, sized by value, red when there was only one bid. Click a dot to open the notice.
The network around SIA
Contracting authorities
Planners and neighbours
- SIA GmbH Alzey1
Contracting authorities and neighbours from the award notices, planners from the office register, brands from the bills of quantities of the tender before the award. Figures are lots.
Competitors
| Company | Awards | Latest |
|---|---|---|
| Seiler Ingenieure & Architekten (SIA)Alzey | 2 | 2 Apr 2024 |
| Seiler Ingenieure & Architekten GmbHAlzey | 2 | 14 Jun 2023 |
| SIA Seiler Architekten & Ingenieure GmbHAlzey | 2 | 25 May 2021 |
| Planungsbüro ISUKaiserslautern | 1 | 21 Sep 2026 |
| Ing. Büro Seiler Ingenieure & Architekten GmbHAlzey | 1 | 12 Aug 2026 |
| Ingenieurbüro Seiler – Ingenieure & Architekten GmbH (SIA) | 1 | 31 Jul 2026 |
| Seiler Ingenieure und Architekten GmbHAlzey | 1 | 18 Jun 2026 |
| Dörhöfer & Partner | 1 | 8 Oct 2024 |
| Seiler Ingenieure & Architekten (SIA) GmbHAlzey | 1 | 20 Jul 2023 |
| Werkplan Michael Heger GmbHKaiserslautern | 1 | 22 Jun 2022 |
Who wins with the 2 most frequent contracting authorities of this company in Planning.
References: recently won
| Date | Lot | Contracting authority | Value | Bids |
|---|---|---|---|---|
| 22 Sep 2025 | Straßenausbauprogramm Schornsheimer Weg, PlanungRoad construction · Source (Council paper) | Ortsgemeinde Sörgenloch | €29,288 | 3 |
| 30 Jun 2025 | Planungsleistungen Schornsheimer Weg (Straßenausbauprogramm)Planning · Source (Council paper) | Ortsgemeinde Sörgenloch | €35,351 | 3 |
| 9 Sep 2021 | Überplanung Kreuzungsbereich Spießgasse / Am DammOther · Source (Council paper) | Stadt Alzey | €6,069 | |
| 28 Jul 2021 | Planungsauftrag Verkehrsführung Kreuzungsbereich Spießgasse / Am DammOther · Source (Council paper) | Stadt Alzey |
The 4 most recent of 4. All with Pro.
Bid comparison
| Rank | Bidder | Bid |
|---|---|---|
| 1 | SIA GmbHAwardAlzey | €29,288 |
| 2 | ohne Namen | €36,895+26% |
| 3 | ohne Namen | €42,298+44.4% |
| Rank | Bidder | Bid |
|---|---|---|
| 1 | SIA GmbHAwardAlzey | €35,351 |
| 2 | ohne Namen | €36,895+4.4% |
| 3 | ohne Namen | €42,298+19.7% |
Bidder lists with prices for awards to this company, from procurement portals and council papers (since 23 Sep 2026). Under each price the gap to the lowest bid.
EU-wide awards 2006 to 2023
29 awards from 18 contracting authorities, €84,270,310 stated. The most frequent:
| Date | Contract | Contracting authority | Value | Bids |
|---|---|---|---|---|
| 3 Nov 2023 | Progetto di messa in sicurezza e incremento della resilienza idrico-idraulica dei territori sottesi dal canale “Fosso Vecchio” mediante costruzione di una cassa di espansione | CONSORZIO DI BONIFICA DELLA ROMAGNA OCCIDENTALELUGO | €12,092,198 | 3 |
| 10 Mar 2021 | untitled | Banca d'ItaliaRoma | €400,444 | 3 |
| 25 Feb 2021 | untitled | Banca d'Italia---Deutsche BundesbankRoma---Francoforte sul Meno | €3,486,250 | 4 |
| 12 May 2020 | untitled | Cassa depositi e prestitiRoma | €5,220,000 | 1 |
| 27 Sep 2019 | untitled | Banca d'ItaliaRoma | €1,674,888 | 2 |
| 2 Aug 2019 | GE1903 — Servizi informatici in outsourcing per Iconto S.r.l. | InfoCamere — Società consortile per azioniPadova | €1,620,000 | 2 |
| 29 May 2019 | untitled | Banca d'ItaliaRoma | €21,520,000 | 1 |
| 25 May 2018 | untitled | Banca d'ItaliaRoma | €12,000,000 | 1 |
| 12 May 2017 | untitled | Cassa depositi e prestiti SpARoma | €246,000 | 1 |
| 28 Dec 2016 | untitled | Enel Italia SrlRoma | €13,692,172 | none |
| 21 Dec 2016 | untitled | Cassa depositi e prestiti SpARoma | €599,700 | 1 |
| 26 Jul 2016 | untitled | Rikiskaup (The State Trading Centre)Reykjavik | €1,337,581 | 1 |
The 12 most recent of 29. All with Pro.
From the EU Official Journal (TED), matched by company key; subsidiaries are not counted. Listed as “SIA SpA”, 2.5 bids on average.
Questions and answers
How many public contracts has SIA GmbH won?
SIA GmbH has received 4 contract awards from public tenders since 2021, most recently on 22 Sep 2025. The notices state a combined value of €70,708 (3 of 4 awards state a value). When the company won, there were 3 bids on average. The EU Official Journal also lists 29 EU-wide awards between 2006 and 2023.
Which contracting authorities does SIA GmbH work for most often?
Most awards came from Ortsgemeinde Sörgenloch (2) and Stadt Alzey (2). In total there are 2 contracting authorities.
In which trades does SIA GmbH win public contracts?
Most awards fall under the trades “Planning” (1) and “Road construction” (1). The trade is assigned from the CPV code and the title of the lot.