Implenia AG IMPN FY24 CHF 3,559 m + Marti Holding (private) + CSC Webuild + Rhomberg Sersa CHF 80 m + Frutiger + Eberhard, Brüttener Tunnel CHF 1.7 bn 8 Jan 2026 + Sisikon CHF 430 m.
Swiss rail delivery workforce against Implenia AG (SIX Swiss Exchange ticker IMPN; HQ Glattpark Opfikon; FY2024 group revenue CHF 3,559 million; EBIT CHF 130.5 million; EBIT margin 3.7%; created from 2006 merger of Batigroup and Zschokke Holding; first SIX trading day 6 March 2006), Marti Holding AG (private; HQ Moosseedorf Bern; ~80 subsidiaries; second-largest Swiss construction group; Marti Tunnelbau AG), CSC Bauunternehmung AG (Lugano-based Swiss tunnelling specialist; part of Webuild Group — parent listed Borsa Italiana WBD.MI), Rhomberg Sersa Schweiz AG (Swiss arm of Rhomberg Sersa Rail Group Austrian/Swiss JV private; SBB framework contractor), Frutiger AG (private Thun Bern; third-largest Swiss construction company; JV partner with Implenia — Sisikon Tunnel + Zukunft Bahnhof Bern RBS), and Eberhard Bau AG (private Kloten; excavation works at Brüttener Tunnel site with Marti AG Zurich JV) — MehrSpur Zürich-Winterthur / Brüttener Tunnel (SBB awarded JV Implenia/Marti 50/50 five of six lots; total ~CHF 1.7 bn — Implenia share ~CHF 830 m; 8.3 km twin single-track TBM tunnel Dietlikon-Winterthur + 1 km Zurich Airport spur; award announced 8 January 2026; TBM boring scheduled August 2029) + Sisikon Tunnel Neue Axenstrasse Lot 200 (Cantons Schwyz/Uri JV Implenia 60% / Frutiger 40%; total >CHF 430 m — Implenia share >CHF 250 m; announced 28 June 2024; construction mid-2025 completion 2034; 4.4 km single-tube two-way road tunnel) + Ligerz Tunnel Lot 2 (SBB JV led by Implenia; 2.1 km double-track Ligerz-Twann) + SBB switch/siding renewal framework (Rhomberg Sersa ~CHF 80 m 2020-2025; ~350 switches/sidings renewed) + Gotthard Base Tunnel derailment repair (Cargo train derailment 10 August 2023 broken wheel; 7 km carriageway renewed + >20,000 sleeper blocks/concrete cradle replaced; SBB confirmed full re-opening 2 September 2024; cost guidance >EUR 100 m) + Ceneri Base Tunnel (opened September 2020 commercial revenue December 2020 15.4 km; CSC earlier-construction-lot participation) + Lötschberg Base Tunnel double-track expansion BLS (full expansion decision early 2024; estimated programme cost CHF 1.7 bn; planning consortium IG Valbt led by SRP Ingenieur) + CEVA Geneva / Léman 2030 (CEVA infrastructure ~CHF 2 bn; Léman 2030 programme CHF 3.9 bn expansion + CHF 2 bn maintenance to 2030; SBB joint with Canton Genève). Entsendegesetz (EntsG) Bundesgesetz 8. Oktober 1999 + Voranmeldepflicht 8-day pre-deployment notification via entsendung.admin.ch + Solidarhaftung EntsG Art. 5 + ISAB GAV-Bescheinigung recognised from 1 January 2023 + Tripartite Kommissionen TPK + LMV Bauhauptgewerbe (LMV 2026-2031 ratified 4 November 2025 in force 1 December 2025 revision 1 April 2026) + SUVA UVG-LAA + 2024 maximum insured annual earnings CHF 148,200 + BauAV Bauarbeitenverordnung.
Request Technical BriefingRegulator exposure profile
- EntsG + Voranmeldepflicht 8-day28%
- Solidarhaftung Art. 5 + ISAB26%
- LMV Bauhauptgewerbe 2026-203124%
- SUVA UVG + BauAV22%
SBB possession + 8-day Voranmeldepflicht.
Swiss rail delivery lifecycle: Implenia + Marti Tunnelbau + CSC (Webuild) + Rhomberg Sersa + Frutiger + Eberhard delivering Brüttener + Sisikon + Ligerz + Léman 2030 under SBB programme.
- 01 T-12mo
Procurement
SBB procurement + simap.ch tender
- SBB
- simap.ch
- 02 T-3mo
Award
JV award (Implenia / Marti / CSC / Rhomberg)
- DBO
- JV
- 03 T-8d
Voranmeldepflicht
8-day pre-deployment notification SECO
- SECO entsendung
- EntsG
- 04 T+0
Possession window
Possession + civil/E&M works
- SBB Regelwerk
- LMV
- 05 T+72h
Hand-back
Track-hand-back + safety-case
- SBB
Named projects in this jurisdiction
- MehrSpur Zürich-Winterthur / Brüttener Tunnel (SBB awarded JV Implenia/Marti 50/50 five of six lots; total ~CHF 1.7 bn — Implenia share ~CHF 830 m; 8.3 km twin single-track TBM tunnel Dietlikon-Winterthur + 1 km Zurich Airport spur; award announced 8 January 2026; TBM boring scheduled August 2029) SBB / Implenia/Marti JV 2026
- Sisikon Tunnel Neue Axenstrasse Lot 200 (Cantons Schwyz/Uri JV Implenia 60% / Frutiger 40%; total >CHF 430 m — Implenia share >CHF 250 m; announced 28 June 2024; construction mid-2025 completion 2034; 4.4 km single-tube two-way road tunnel) Cantons Schwyz + Uri / Implenia + Frutiger 2024
- Gotthard Base Tunnel derailment repair (Cargo train derailment 10 August 2023 broken wheel; 7 km carriageway renewed + >20,000 sleeper blocks/concrete cradle replaced; SBB confirmed full re-opening 2 September 2024; cost guidance >EUR 100 m / ~CHF 100 m+) + Léman 2030 programme (CHF 3.9 bn expansion + CHF 2 bn maintenance to 2030 SBB joint with Canton Genève) SBB / Canton Genève 2024
- Implenia AG (SIX IMPN; FY24 CHF 3,559 m revenue + EBIT CHF 130.5 m) + Marti Holding AG (private 2nd-largest) + CSC Bauunternehmung AG (Webuild WBD.MI) + Rhomberg Sersa Schweiz AG (private) + Frutiger AG (private Thun 3rd-largest) + Eberhard Bau AG (private Kloten) Implenia + Marti + CSC + Rhomberg + Frutiger + Eberhard
Swiss rail: Implenia AG (IMPN; FY24 CHF 3,559 m), Marti Holding (private), CSC (Webuild WBD.MI), Rhomberg Sersa, Frutiger, Eberhard. Brüttener Tunnel ~CHF 1.7 bn (Jan 2026) + Sisikon CHF 430 m (Jun 2024) + Gotthard derailment repair to Sep 2024 + Léman 2030 CHF 3.9 bn + Lötschberg CHF 1.7 bn. EntsG + 8-day Voranmeldepflicht + Solidarhaftung + LMV govern.
01. Pre-pricing — LMV Bauhauptgewerbe 2026-2031
LMV Bauhauptgewerbe 2026-2031 (ratified 4 Nov 2025 in force 1 Dec 2025; revision 1 Apr 2026) wage floor per worker. Annual CPI indexation 0-2%.
02. A1 + 8-day Voranmeldepflicht pre-deployment
A1 portable document per posted worker. 8-day Voranmeldepflicht via entsendung.admin.ch before any work start. Sectors incl. construction trigger from day one.
03. SECO + TPK + ISAB onboarding
SECO administration. TPK (Tripartite Kommissionen) cantonal inspection. ISAB GAV-Bescheinigung as Solidarhaftung due-diligence relief (since 1 Jan 2023).
04. SECO + SUVA-defensible evidence pack
Minimum pack: Switzerland-bank-traceable remuneration, German/French/Italian-language contract per region, A1 receipt, Voranmeldepflicht receipt (8 days ahead), LMV reconciliation, ISAB GAV-Bescheinigung, SUVA UVG insurance, CENELEC competency per safety-critical rail worker.
05. India and Gulf sourcing corridors — the Switzerland rail pathway
Indian Larsen & Toubro Rail + Gulf Saudi Binladin pools route through EntsG + 8-day Voranmeldepflicht + LMV + ISAB audit-grade chain-of-custody against Implenia, Marti, CSC (Webuild), Rhomberg Sersa, Frutiger, or Eberhard scopes.