Zeryán Guerra

Services

Everything your bid needs to compete and win

Consulting for contractors and EPCs bidding on energy and infrastructure construction projects in Chile.

Technical & commercial proposals for tenders

End-to-end bid development: tender analysis, construction strategy, itemized budget with detailed unit price analysis, Gantt schedule, manpower and equipment histograms, and a submission-ready administrative dossier.

Unit price analysis (APU)

Direct and indirect cost build-up per work item for commercial bids or ongoing works: labour with Chilean statutory charges, materials, equipment and subcontracts, based on real crew productivity.

Operational cost audits

Independent cost review of ongoing works: budget deviations, productivity, payment applications and contractual commitments, with actionable KPIs to recover margin.

Local bridge for international companies

Support for foreign EPCs entering Chile — with direct experience alongside Chinese companies: labour and subcontracting law, electrical regulation (SEC), local suppliers and bilingual documentation.

Second service line

Mining permits in Chile: from the file to the resolution

Beyond energy construction, I handle the sectoral permits a mining operation needs to run and to sell: Exploitation Project and Closure Plan before SERNAGEOMIN, explosives magazine authorisation, habitual explosives consumer status and ENAMI producer registration. I am a partner and legal representative of an operating underground copper mine — these are the filings I ran for it.

See mining permitting services

Methodology

The price is the last thing I calculate

Every study follows the same working order, proven on bids that were later built. The goal is simple: no tender requirement left uncosted.

1. Tender rules and constraints

A condensed version of the tender documents, with every requirement affecting cost or schedule logged with its source: laydown areas, security, special PPE, road reinstatement.

2. Compliance matrix

Every scope activity checked against the study and classified: covered, partial, uncosted or not applicable. The study does not close while uncosted rows remain.

3. Independent take-offs

Quantities verified from the drawings even when the owner provides a BOQ, with drawing, zone and measurement criteria recorded to defend them during clarifications.

4. Supplier RFQs

Real quotations by category — site facilities, machinery, services, supplies, subcontracts, bonds — priced for that location and that moment, not from memory.

5. Unit prices from crew and method

Each item priced from the construction method: crew, equipment and realistic output for that terrain. Overheads built resource by resource, driven by the schedule.

6. Integrated proposal

Budget, schedule, manpower histogram and technical proposal all come from the same workbook and stay consistent with each other. Cross-checked by chapter structure before submission.

Track record

Projects behind every proposal

Field and technical-office experience across the full cycle: bidding, construction, commissioning and contract close-out.

CEME1 Solar PV · 480 MW

Subcontractor Manager · María Elena, Chile

Managed more than USD 40M in payments to 50 subcontractors and 50 suppliers for a Chinese EPC, from bidding and mobilization through payment applications and dispute resolution.

Huatacondo BESS · 400 MWh

Site Manager · Pozo Almonte, Chile

Negotiated the construction contract and managed the site end-to-end through commissioning of 72 BESS containers, including upgrades to the interconnection substation.

Pueblo Seco Substation · 154/23 kV

Technical Office Lead · Chillán, Chile

Construction of a 20 MVA substation and a sectionalized transmission line: drawing reviews, take-offs, supplier negotiation and physical-financial control.

Sol de Lila Solar PV · 163 MW

Site Support Engineer · Calama, Chile

Tracked and reported physical and financial progress across engineering, permits, procurement, construction and commissioning, designing project KPIs for the owner.

HV substation expansion · Santiago

Lead Consultant · 2026, ongoing

Full construction bid development for an international EPC: take-offs from drawings, itemized unit prices, supplier RFQs, technical proposal and administrative dossier with SEC Class A validation.

Digua Dam Hydro Plant · 20 MW

Technical Office Engineer · Parral, Chile

Detail engineering review, take-offs, procurement and quality control in the construction of the plant and its step-up and tap-off substations.

About

I am a Mining Engineer (Universidad de La Serena) with more than 15 years across mining, energy and EPC construction in Chile. I have sat on every side of the table: technical office in the field, subcontract management for a Chinese EPC, site management of a 400 MWh BESS, and business development leading a proposal portfolio of more than 1.5 GW of solar PV and 4 GWh of storage.

That combination — having bid, built and closed out contracts — is what I bring to every proposal: defensible numbers item by item, realistic construction methodologies, and documents that comply with tender rules the first time.

Download my CV

Full track record, projects and certifications.

CV in Spanish CV in English

Contact

Let us talk about your next tender

Tell me about the project and I will reply with a tailored work proposal, free of charge and without obligation.

Message me on WhatsApp ✉ zeryan.guerra@gmail.com

Santiago, Chile · Available for projects nationwide and remote consulting in English or Spanish.