Seyses
Seyses is a Spain-based firm providing construction management, O&M, and site control services for large-scale renewable energy projects. It serves developers, EPC contractors, and OEMs across the Americas and Iberia with 300+ professionals and proprietary SimplyAccess and SimplyAudit mobile platforms.
- Company typePrivate
- Founded2017
- HeadquartersSevilla, Spain
- Headcount101–250
- GTM typeB2B
- OfferingServices
What Seyses does
Seyses is a Spain-headquartered international firm providing independent construction management, operations and maintenance (O&M), and site control/subcontractor management services to the renewable energy and critical infrastructure sectors. Founded in 2017 and headquartered in Seville, the company serves large and mid-scale renewable energy project developers, EPC contractors, and equipment OEMs across the Americas (USA, Mexico, Colombia, Brazil, Chile, Peru) and the Iberian Peninsula. The company reports having managed over 400 renewable energy projects totaling 44.5 GW across solar, wind, and battery energy storage system (BESS) technologies, with a customer base of more than 100 top-tier clients that includes Statkraft, Zelestra, Pattern Energy, Atlas Renewable Energy, COLBÚN, OPDEnergy, Prodiel, and Aguas Andinas. Legal entity is SEYSES IBÉRICA, S.L.U., a Spanish single-member limited liability company.
Seyses delivers three core service lines: Construction Management and Supervision (covering planning, execution, and project closure), O&M Management (preventive and corrective maintenance, warranty management, and technical advisory to maximize plant uptime), and Site Control (document management, accreditation, and access control for subcontractors). These services are supported by two proprietary mobile applications: SimplyAccess, a QR-code-based access control application for workers and machinery that validates labor and safety documentation before granting site entry, and SimplyAudit, a field audit and checklist deployment tool. Both applications work on iOS and Android in online and offline modes, are connected to a centralized cloud platform, and support multi-country deployments with localization for Spanish, English, and Portuguese. A "Reverse Site Control" offering pushes documentation into client-mandated platforms, indicating interoperability with third-party systems.
Seyses operates a professional services revenue model with quote-based, project-tailored pricing and multi-year contracts. The company does not publicly disclose pricing and has no self-service or marketplace distribution channels; all sales occur via direct enterprise field engagement through six country-level subsidiaries. Go-to-market is regional: each subsidiary is led by a Country Manager with technical teams deployed at client project sites. The company is privately held under Spanish law with no disclosed external investors, funding rounds, or parent company, and leadership includes CEO George Berczely, CFO Fernando González, CTO José María González, VP Operations Ramón Charlo, and HR Director Reyes Núñez. With over 300 professionals distributed across the six subsidiaries and a 44.5 GW managed portfolio, the business is anchored in large enterprise contract wins with renewable energy developers and EPC contractors, where multi-country presence, local regulatory expertise, and proprietary tooling constitute the primary barriers to entry.
Seyses firmographics
Firmographics- Name
- Seyses
- Legal name
- SEYSES IBÉRICA, S.L.U.
- Website
- https://seyses.com
- Company type
- Private
- Founded year
- 2017
- Operating status
- Operating
- Headcount range
- 101–250 employees
- Short description
- Seyses is a Spain-based firm providing construction management, O&M, and site control services for large-scale renewable energy projects. It serves developers, EPC contractors, and OEMs across the Americas and Iberia with 300+ professionals and proprietary SimplyAccess and SimplyAudit mobile platforms.
- Ownership category
- akta.pro rank
Seyses industry classification
Industry- Product category
- Renewable Energy Construction Management Services
- NAICS
- Architectural, Engineering, and Related Services (5413)
- SIC
- Services-Engineering Services (8711)
- akta.pro primary industry
- Systems Engineering & Technical Program Management (BPAHAIAI)
- akta.pro secondary industry
- Operational Controls, SOPs & Environmental Work Instructions (EUAHAIAJ)
Keywords
Where Seyses is headquartered
LocationHeadquarters
- HQ city
- Sevilla
- HQ country
- Spain
- HQ region
- Europe
Offices7 records
Markets served
Seyses business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure
Revenue model
- Construction Management and Supervision Services: Professional services revenue from planning, organization, and oversight of construction projects including technical supervision, quality control, health and safety management, and project closure support. Services are provided to asset owners, developers (promoters), EPC contractors, and technology providers throughout the project lifecycle from pre-RTB phases through commissioning.
- Operations and Maintenance (O&M) Management Services: Recurring professional services for planning and executing preventive and corrective maintenance activities for energy facilities. Includes warranty management during warranty periods, documentation and reporting, and ongoing technical advisory to maximize plant uptime and performance ratios.
- Site Control and Subcontractor Management Services: Document management, accreditation, and access control services for construction projects. Revenue generated through platform access and validation services, including the SimplyAccess app for access control and document matrix management. Also offered as a self-service tool for clients to manage their own validations.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Multi-year contract | Custom project-based pricing |
Go-to-market motion1 record
Distribution channels1 record
Marketing channels5 records
Seyses product offering
Product offeringCore offering
SEYSES provides comprehensive construction management, supervision, and site control services for large and medium-scale renewable energy projects (solar, wind, BESS). The company serves asset owners, EPC contractors, and technology providers across the Americas and Iberia through three core service lines: Construction Management & Supervision, Operations & Maintenance, and Site Control. These services are delivered with supporting proprietary mobile applications (SimplyAudit and SimplyAccess) used for field audits and access control on project sites.
Product overview
SEYSES offers a unified platform of project management and supervision services for renewable energy projects, comprising three core service lines: Construction Management, Operation and Maintenance, and Site Control. These services are supported by two proprietary technology applications—SimplyAccess (access control and document validation) and SimplyAudit (field audit and checklist deployment). The portfolio covers the full project lifecycle from construction through operations, with integrated technology tools enabling document management, accreditation tracking, and access control.
Differentiator
Problem solved
Functional benefit
Products and services
- Construction Management and Supervision (Gestión y Supervisión de Obra) Comprehensive project management and on-site technical supervision service covering planning, execution, and project closure phases for renewable energy projects. Provides independent oversight for asset owners/developers and supports EPC contractors in managing subcontractor work, ensuring compliance with schedule, budget, quality, safety, and technical specifications across the full construction lifecycle.
- Operations and Maintenance (Operación y Mantenimiento) Planning and execution of all O&M activities for renewable energy plants, including preventive and corrective maintenance, warranty management, and ongoing documentation/reporting. Service is designed to maximize plant uptime and performance ratios for renewable energy facilities.
- Site Control Document management, accreditation generation, and access control service for construction project sites. Collects, validates, and safeguards subcontractor documentation (licenses, insurance, compliance certificates) and implements access control systems to monitor site entry and exit, minimizing subcontractor-related risks and liabilities for project owners.
- SimplyAccess Proprietary mobile access control application for iOS and Android, connected to the SEYSES platform. Scans QR codes of worker and machine accreditations and automatically grants site access when labor and safety requirements are met. Supports both online and offline modes for field use.
- SimplyAudit Proprietary field audit application for iOS and Android enabling scheduling and execution of standardized audit checklists. Field personnel can add comments and photos for subsequent evaluation and follow-up. Connected to the SEYSES platform and supports online and offline modes.
Quantifiable outcome
- Over 400 renewable energy projects managed across the Americas and Europe
- +3 more outcomes
Companies that use Seyses
Customer profileNamed customers8 records
Segments3 records
Ideal customer profiles3 records
Seyses technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature3 records
Seyses partnerships and signals
Strategic signalScale indicators7 records
Recent moves6 records
Expansion highlights5 records
Seyses competitors and assessment
Company assessmentBroad incumbents
- Bureau Veritas: Larger testing, inspection, and certification incumbent with a dedicated renewables practice covering solar, wind, and BESS project supervision and asset integrity services. Comparable in service overlap but operates as part of a much broader TIC portfolio spanning multiple industries.
- SGS: Global TIC incumbent offering independent engineering and supervision services for renewable energy construction and O&M. Comparable in service mix to SEYSES but bundled inside a much larger testing and inspection network.
- AECOM: Global infrastructure consulting giant providing construction management, owner's engineer, and environmental services for energy projects. Comparable on construction supervision but as part of a much larger transportation, water, and infrastructure portfolio.
- Worley: Global energy engineering and project services firm providing owner's engineering, construction management, and O&M advisory across renewables and conventional energy. Comparable on technical supervision but with broader scope across oil and gas, chemicals, and mining.
Direct peers
- AFRY: European engineering and design consultancy with renewable energy owner's engineer and project supervision services across wind, solar, and BESS. Comparable in scope of services and in serving European and Latin American renewable energy developers.
- ERM (Environmental Resources Management): Pure-play environmental, health, and safety consultancy that supports renewable energy developers with EHS management, construction supervision, and ESG advisory. Closely comparable on the H&S, ESG, and compliance side of SEYSES' Site Control and construction supervision offerings.
- DNV: Global energy advisory and certification firm that provides owner's engineer, independent engineering, and project supervision services for renewable energy projects. Closely comparable to SEYSES' construction supervision business across solar, wind, and BESS, though DNV operates at much larger scale and across more geographies.
- UL Solutions: Testing, inspection, and certification firm with a growing energy advisory practice covering renewable energy project supervision, due diligence, and technical advisory. Comparable to SEYSES in serving project developers and EPCs across the solar and wind project lifecycle.
- TÜV SÜD: Global testing, inspection, and certification company with deep renewable energy project services including owner's engineer, construction supervision, and O&M advisory. Overlaps SEYSES on the technical supervision, quality assurance, and compliance side of renewable energy project delivery.
- Mott MacDonald: International engineering consultancy with a strong owner's engineer and project management practice for renewable energy and transmission infrastructure. Comparable on construction supervision and technical advisory for developers and EPCs across solar, wind, and grid projects.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
Seyses social profiles
Digital presenceSeyses financial estimates
Financial estimateRevenue estimate
Valuation estimate
Seyses leadership team
Management profileNumber of profiles
Profiles9 records
Seyses subsidiaries and ownership
Company hierarchySubsidiaries6 records
Seyses funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Seyses M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Seyses
What does Seyses do?
SEYSES provides comprehensive construction management, supervision, and site control services for large and medium-scale renewable energy projects (solar, wind, BESS). The company serves asset owners, EPC contractors, and technology providers across the Americas and Iberia through three core service lines: Construction Management & Supervision, Operations & Maintenance, and Site Control. These services are delivered with supporting proprietary mobile applications (SimplyAudit and SimplyAccess) used for field audits and access control on project sites.
Is Seyses a public or private company?
Seyses is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Seyses founded?
Seyses was founded in 2017. It employs 101 to 250 people.
Where is Seyses based?
Seyses is headquartered in Sevilla, Spain, in the Europe region.
How does Seyses make money?
Three revenue lines are on record. Construction Management and Supervision Services are the primary driver. The others are operations and Maintenance (O&M) Management Services and site Control and Subcontractor Management Services.
Who are Seyses's main competitors?
Broad incumbents on record are Bureau Veritas, SGS, AECOM and Worley. Direct peers are AFRY, ERM (Environmental Resources Management), DNV, UL Solutions, TÜV SÜD and Mott MacDonald.
Does Seyses have an API?
No public API is recorded for Seyses.
What industry is Seyses in?
Seyses's product category is Renewable Energy Construction Management Services. Its primary akta.pro industry code is BPAHAIAI, Systems Engineering & Technical Program Management, with a secondary code of EUAHAIAJ, Operational Controls, SOPs & Environmental Work Instructions. Its NAICS code is 5413 and its SIC code is 8711.