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Marriott Belén.

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Marriott Belén.
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S3 Ingenieros

Great projects begin with thoughtful decisions.

Marriott Case Study

Over several years, S3 Ingenieros has supported Marriott Belén Hotel through a comprehensive evolution of its infrastructure, combining multidisciplinary design, energy optimization, strategic advisory, and technical oversight.

The scope ranged from the redesign of the parking facility’s civil, electrical, and stormwater infrastructure, to the analysis, preliminary sizing, and technical support throughout the bidding, award, and supervision of a photovoltaic system with microgrid and battery energy storage (BESS).

Prior to engaging a specialized provider, S3 led the technical evaluation process, definition of requirements, and structuring of the bidding process—ensuring the energy project met criteria for technical feasibility, operational continuity, and return on investment.

Subsequently, S3 assumed investment oversight during the design, construction, and commissioning phases of the system, ensuring quality, cost control, and contractual compliance.

This comprehensive engagement enabled Marriott Belén Hotel to reduce technical risks, improve decision-making, and execute complex projects with full technical traceability—fully aligned with international hospitality operating standards.

Marriott

Technical, energy, and operational complexity within an active hospitality asset

The hotel faced multiple challenges simultaneously:

  • Existing infrastructure requiring civil, electrical, and stormwater redesigns to support new areas such as the parking facility.

  • Critical decisions regarding the transition of energy systems, moving from isolated solutions to an integrated scheme involving a microgrid, solar generation, and battery energy storage.

  • The need to evaluate highly complex technical proposals from specialized vendors without compromising the hotel’s operational continuity.

  • Risk of overinvestment, oversized designs, or solutions misaligned with real operational and regulatory conditions.

Without a comprehensive perspective and an independent technical advisor, the project risked becoming fragmented, more expensive, or losing both technical and financial control.

From isolated projects to an integrated, controlled technical strategy

S3 Ingenieros acted as the owner’s trusted technical advisor, shifting the project’s approach:

  • From isolated decisions → to a systemic view of infrastructure and energy.

  • From price-driven bidding → to structured processes with clear technical criteria.

  • From reactive execution → to planned, controlled, and continuous technical oversight.

This shift enabled the client to make informed decisions from early stages, reduce uncertainty, and align design, construction, and operations under a single, coherent technical framework.

  1. Comprehensive technical support: design, advisory, bidding, and oversight

    S3 delivered an integrated solution that included:

    Infrastructure Design & Redesign

    • Civil, electrical, and stormwater infrastructure for the hotel’s parking facility.

    • Redesign of lighting, access control, and telecommunications systems.

    • Geometric optimization and earthworks planning to minimize construction impacts and costs.

    Strategic Energy Advisory

    • Analysis and preliminary sizing of the photovoltaic system and microgrid.

    • Definition of technical criteria for the bidding and award of an EPC + O&M provider.

    • Independent technical evaluation of proposals prior to contracting.

    Investment Oversight & Construction Control

    • Technical review of the final microgrid system design.

    • Supervision of construction, testing, and commissioning.

    • Control of progress, submittals, and milestone-based disbursements.

    • Final project acceptance and verification of contractual compliance.

The Result:

Marriott Belén Hotel successfully executed projects of high technical and energy complexity with full control—reducing risks, optimizing investments, and ensuring uninterrupted operations. S3 Ingenieros consolidated its role as a strategic technical partner, capable of integrating infrastructure, energy, and project management through an independent, rigorous, and results-driven approach.

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