Andrés (Leonardo) Guevara Kluxen
Freelancer
Experience
Freelancer
ALGK-BAUPRO
- Scope of work [link]
Project Director Infrastructure
VINCI GeoInfrastructure GmbH Deutschland
- Project – SuedOstLink, Lot C1, Cable Route
- 90 km cable trench
- 80 crossings (cut & cover, HDD, microtunnelling)
65 large joint bays (muff houses)
10 soil treatment plants
Project Director Tunnelling
Implenia Construction GmbH
- Project – Crossing River Elbe Hamburg
- TBM CREG EPB OD 4300 segment lining, 1.2 km
- 2 shafts with diaphragm walls Ø 23 m, depth 39 m
- Buoyancy protection base plate with anchor
- Steel construction for culvert for district heating supply and return pipe ID 800
- Passage through alternating glacial sediments with up to 45 m water pressure
Division Manager & Head of Technical Department
Gebrüder Karstens GmbH & Co KG
- Numerous projects in infrastructure building, road construction, pipeline construction
- Head of construction equipment
- Up to 60 employees
Project Director & Managing Director Tunnelling, Head of Tunnel Department
Vianini Lavori SpA – Lovön Samverkan AB Joint Venture
- Construction time 71 months (start blasting Oct 2017)
- 5 Atlas Copco boomer
- 2 stationary crushing plants + 3 mobile crushing plants
- 2 concrete batching plants (120 m³/h)
- 9 million tons granite hard-rock excavation with vehicle-conveyor-belt-seaborne mucking system
- Access tunnel (80 m², 6 km), main tunnel (130 m², 14 km), junctions up to 200 m²
- 8 ventilation chambers (>22,500 m³), 8 shafts (raise boring 45 m–110 m, Ø 9.8 m)
- Conventional rock pre-support (NATM) with grouted anchors, wire mesh, shotcrete
- Tunnel inner lining: 3 road lanes with concrete impact walls and waterproof membrane roof sealing
Project Director Tunnelling, Head of Tunnel Department
Ed. Züblin AG – Division International Tunnelling
- Construction time 50 months (start drilling end of 2016)
- TBM Atlas Copco OD 3900 hard-rock double-gripper with rail-bounded muck removal (13.5 km)
- Conventional support (NATM) with grouted anchors, wire mesh, shotcrete
- Access tunnel by road header Sandvik MT 720 (1.3 km, 29 m²)
- Site installation, steel lining and grouting of 100″ pipe (14.1 km total)
- David surge shaft: vertical shaft by raise boring/drill & blast (Ø 4 m–5.5 m, depth 290 m)
- Excavated volume: 225 000 m³ / 585 000 t
- Personnel up to 120, contract volume > €200 million
Senior Construction Manager Tunnelling
Royal BAM Group - Wayss & Freytag Ingenieurbau AG
- EPB boring machines ID 1600–2400 and ID 2800 with slurry transport and fluid support
- Annulus overcut with centralised bentonite lubrication system
- Start/reception shafts with secant bored piles/diaphragm walls Ø 12 m–25 m, depth 17 m–36 m
- Reinforced concrete jacking pipes ID 1600–2800 (OD 2100–3600), max string length 1450 m with 9 intermediates
- Total length 51 km, bends down to 500 m radius, max jacking force 21 000 kN
- Crossings of motorways, canal, railways in soft rock (7 MPa), groundwater pressure up to 3.6 bar
- Personnel up to 70, contract volume > €400 million
International Senior Project Manager
Meyer & John GmbH & Co. KG
- Pipe jacking with open shield and tunnel scraper
- Full face boring with slurry transport and bentonite face support
- Annulus overcut with centralised bentonite lubrication
- Compressed air site, sheet-piling start/reception shaft (13 m×7 m×16 m)
- Jacking pipes ID 3100 (OD 3800) and GRP ID 800 (OD 870), total length 650 m, 3 intermediates
- Bend radius infinite, max jacking force 6000 kN, crossing harbour bay in interbedded sand, clay, peat, 1.6 bar water pressure
- Personnel up to 20, contract volume €1.3 million
International Senior Project Manager
Meyer & John GmbH & Co. KG
- Full face boring with slurry transport and bentonite support
- Annulus overcut with centralised bentonite lubrication
- In-situ concrete start/reception shaft (6 m×4.5 m×6 m)
- Jacking pipe ID 1200 (OD 1720), length 120 m, 4 intermediates
- Bend radius infinite, max jacking force 8000 kN, crossing motorway A7, hard sandstone (70 MPa)
- Personnel up to 8, contract volume €250 000
International Senior Project Manager, TBM Tunnel Manager
Meyer & John GmbH & Co. KG
- Full face boring with slurry transport and bentonite support
- Annulus overcut with centralised bentonite lubrication
- In-situ concrete start/reception shaft (6 m×4.5 m×6 m)
- Jacking pipe ID 1200 (OD 1720), length 1050 m, 7 intermediates
- Bend radius infinite, max jacking force 8000 kN, inner-city hard limestone (40 MPa)
- Personnel up to 15, contract volume €2.4 million
International Senior Project Manager, TBM Tunnel Manager
Meyer & John GmbH & Co. KG
- Full face manned boring with slurry transport and bentonite support
- Annulus overcut with centralised bentonite lubrication
- In-situ concrete start/reception shaft (9 m×6.5 m×12 m)
- Jacking pipe ID 2200 (OD 2680), length 750 m, 4 intermediates
- Bend radius infinite, max jacking force 12 000 kN, crossings of motorway and railway, 0.6 bar water pressure
- Personnel up to 20, contract volume €3.3 million
International Senior Project Manager, TBM Tunnel Manager
Meyer & John GmbH & Co. KG
- Direct Pipe system Herrenknecht for 48″ PE-coated steel gas pipeline
- Pipe thruster force 7500 kN, bend radius 1900 m, length 250 m
- Start/reception shafts with steel sheet piles (Larson L 603)
- Personnel up to 8, contract volume €150 000
International Construction & Production Manager
STRABAG S.E. - STRABAG International GmbH
- Rehabilitation and upgrading of Tripoli International Airport road (TIAR), 2×4 asphalt lanes, 25 km
- Milling and asphalt pavement: 260 000 t; 50 km concrete barrier
- Geotechnical investigation, quarry licensing and operation with crushing plants
- Erection of asphalt plant (240 t/h) and concrete plant (60 m³/h)
- Transport department setup (30 trucks), staff camp for 350
- Personnel up to 240, contract volume €180 million
International Construction Manager Tunnel Equipment
FOGTEC Brandschutz GmbH & Co. KG
- Design and manufacture of tunnel fire protection with high-pressure water mist (240 bar)
- 1.5 MW pump capacity, 45 km stainless steel piping ID 10 mm–276 mm
- Installation of smoke and fire detection systems with Ethernet control
- Sites: Madrid M30, Oviedo A5, Granada railway station
- Personnel up to 60, contract volume €23.5 million
Construction Manager
TBS-Bau GmbH
- Development and building of residential area Fallersleben: 250 one-family houses + 70 multi-family residences
- Development and building residential area Hannover-Krohnskamp (Expo 2000)
Project Manager
Heilit + Woerner Bau AG
- Pile foundation for River Saale bridge Jena (24 bored piles Ø 1.8 m, depth 36 m)
- Renovation and elongation of Erfurt airport runway (145 000 m²)
- Subterraneous cable trays (1 500 m), highways A9, A4, A71 embankments
- Toxic-waste dumps with 2–4 layer mineral sealing (40 000 m²–80 000 m²)
Project Manager Geotechnical Engineering
Jena-Geos-Ingenieurbüro GmbH
- Soil investigation and geotechnical foundation consultancy
- Soil and rock mechanics, engineering geology, geosynthetics, environmental geotechnics
- Head of soil mechanics laboratory
Industries Experience
See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.
Experienced in Construction (32.5 years), Real Estate (6 years), Manufacturing (3.5 years), Energy (1 year), and Utilities (0.5 years).
Business Areas Experience
The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.
Experienced in Project Management (26.5 years), Operations (13.5 years), Production (5.5 years), Research and Development (4 years), and Product Development (3.5 years).
Summary
With over 30 years of work experience on national and international large-scale projects, I offer comprehensive expertise and hands-on leadership in infrastructure, civil engineering, and specialized deep excavation. The project volumes I managed regularly ranged in the two- and three-digit millions. My focus is on technical management, quality-assured execution, and coordination of demanding construction processes in service phases 6 to 9.
Skills
Service Range – Hoai Lph 6 To 9
- Lph 6 – Preparation Of Awards
- Creating Structured Bills Of Quantities
- Coordinating Technical Interfaces And Quantity Estimates
- Supporting The Readiness Of Tender Documents
- Lph 7 – Participation In Awarding
- Technical Bid Review And Price Comparisons
- Supporting Bidder Communication And Renegotiations
- Preparing Award Proposals
- Lph 8 – Site Supervision (According To Hoai And Vob/b)
- Monitoring Quality, Schedule, And Costs
- Coordinating Contractors, Tracking Progress
- Inspections, Defect Management, Invoice Review, Documentation
- Lph 9 – Project Closeout Support
- Warranty Tracking And Technical Support
- Condition Assessments And Reports
- Final Documentation And Handover
Shaft Structures / Underwater Concrete Bases
- Bored Pile Shafts & Slurry Wall Shafts
- Construction & Finishing Of Large Shafts
- Dimensions Up To 50 M Deep And 35 M Wide
- Underwater Concrete Bases (Anchored)
- Construction Under Groundwater Pressure
- Sealing / Load Transfer Under The Toughest Conditions
Complex Deep Foundations With Dive Support
- Accompanying Dive Operations For Soil & Concrete Work
- Visual Inspections, In-place Parts & Reinforcement Underwater
Planning, Project Supervision, Execution
- Technical Management & Safety Coordination
- Interface Between Excavation Support And Deep Foundations
Change Order And Claim Management (For Lph 6–9)
- Identifying Entitlement Situations
- Developing Technical And Timeline-based Claim Documentation
- Supporting Processing And Communication
Managing And Optimizing Complex Construction Processes
- Analyzing Complex Workflows And Performance Processes
- Identifying Technical Bottlenecks And Process Disruptions
- Setting Up And Moderating Lean Management Structures – Last Planner Method For Schedule, Timeline, And Resource Optimization (Workshop-based)
Sige Coordination Under The German Construction Site Ordinance (Baustellv)
- Creating And Updating The Safety And Health Plan (Per Rab 30)
- Early Notification, Coordinating Safety-related Interfaces
- Integrating Safety Processes Into Schedule And Workflow Planning
- Qualification Under Rab 30 (Modules B & C) Completed
Soil Assessment And Foundation Consulting According To Din 4020
- Assessing Soil Conditions To Derive Technical Measures
- Contributing To The Evaluation Of Soil Parameters And Exploration Results
- Geotechnics As A Single Source – Handled Personally Or Coordinated With Experts
- Settlement Calculations (Uniaxial / Multiaxial Loaded Areas)
- Slope And Excavation Stability Proofs (Bishop / Janbu)
- Bearing Capacity And Terrain Failure Safety Analyses
- Drawdown Cone Analysis And Design Of Temporary Water Control
- Soil Mechanics / Rock Mechanics – Exploration, Design, Forecasting, Monitoring
Deployment Profile
- Main Focus: Lph 6–9, Sige Coordination, Change Order And Claim Management, Lean Construction Management, Soil Assessment
- Technical Project Support On Both Sides Of Award – Hands-on, Solution-oriented, Responsible
- Available For Operational Management, On-site Consulting, And Technical Project Support
Additional Skills
- Organization: Project Management, Construction Management, Production Management, Technical Development, Business Development
- Computer: Ms Office (Excel, Word, Powerpoint), Basic Autocad, Various Process Software
Key Qualifications (Relevant To Tunnelling/microtunnelling/pipe Jacking/direct Pipe)
- Project And Construction Management Of Full-face Tbm (Hard-rock Double Gripper, Epb System, Mix-shield Slurry System), Pipe Jacking/microtunnelling/direct Pipe (Herrenknecht) With Fluid-supported Cutterhead, Open Shield Pipe Jacking With Tunnel Digger, Scraper, Semi-cutting Or Roller Cutter; Diameters Id 600 To Id 3000, Auger Boring With Rod Pilot System (Perforator/mts)
- Project And Construction Management Of Natm Tunnel Excavation By Drill & Blast And Rock Support With Friction/fully Grouted Anchors, Wire Mesh, Shotcrete; Cross-sections Up To 130 M²
- Project And Construction Management Of Manned Pipe Jacking In Nominal Diameters Id 1200 To Id 3000, Including Pressurized Air Locks For Personnel And Materials From Id 1600 Up
- Project And Construction Management For Muck Handling With Separation Plants (Schauenburg, Bauer, Derrick) Up To 700 M³/h And Mobile Sludge Dewatering (Centrifuge, Chamber Filter Press)
- Project And Construction Management For Muck Processing With Stationary Hard Rock Crushers (Up To 1,250 T/h) And Mobile Crushers (Up To 750 T/h)
- Special Subsoil And Underground Condition Knowledge To Optimize Cutterheads; Special Groundwater Knowledge To Improve Tunnelling, Pipe Jacking, And Microtunnelling
- Design Of Sinking Shafts; Site-built Shafts In In-situ Concrete; Diameters 2.4 M To 25 M, Depth < 36 M
- Design Of Shaft Start And Reception Pits With Concrete Piles, Mixed-in-place Piles, Secant Piles, Sheet Piles, Etc.; Diameter Up To 25 M, Depth < 40 M
Languages
Education
Technische Universität Clausthal
M.Sc. Geology / Diplom Geologist, Engineering Geology · Geology · Clausthal-Zellerfeld, Germany
Universität Hamburg
Pre-degree examination · Business administration · Hamburg, Germany
Gymnasium in Borgfelde
A-level exam, University entrance diploma · Hamburg, Germany
Certifications & licenses
Driving licence: B
Qualification under RAB 30 (Modules B & C) completed
Profile
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