OTEC provides sustainable design services which address:

- Building Energy Analysis
- Daylighting consulting
- Sustainable design consulting

OTEC is hired by building owners, architects and engineers to assist in the design of functional, comfortable, healthy environmentally responsive buildings. OTEC operates in Brazil under a strategical  partnership with AEC that provides their clients with experience in a diversity of buildings types, including office, restaurant, retail, university, museums, healthcare, research laboratories, schools, airport terminals, industrial, residential, and mixed-use commercial projects.

Clients who hire Sustainable Design Assistance may also want to hire LEED® consulting services in order to certify their buildings.

The LEED (Leadership in Energy and Environmental Design™) rating system is a voluntary, consensus-based American standard for developing high-performance, sustainable buildings. LEED provides a framework for assessing building performance and meeting sustainable goals. LEED emphasizes state-of-the-art strategies for sustainable site development, water conservation, energy efficiency, materials selection, and indoor environmental quality. LEED recognizes achievements and promotes expertise in sustainable building through a comprehensive system offering project, certification and professional accreditation.

The LEED rating system has become the industry-leading process by which to document and to validate sustainable building design and construction practices.

OTEC provides comprehensive building commissioning and diagnostic testing services to address building performance, operation and maintenance issues from design, through construction and occupancy, to ongoing operations.

Clients that are certifying their buildings under the LEED rating system can count on OTEC’s knowledge about LEED commissioning processes. 

 OTEC evaluates energy performance of residential, commercial, institutional and industrial buildings. OTEC provide its energy evaluation services to building owners, property managers, architects, utilities, energy service companies and government agencies to commission, re-commission, retro-commission or conduct energy audits and diagnostic testing of building energy systems, including HVAC, lighting, controls, distributed generation, refrigeration, commercial kitchen equipment and renewable energy systems.

OTEC offers technical writing and editing services to transfer information, particularly that on energy efficient design and construction, to the architecture, engineering, and construction professions.

- defining the content of each technical document
- preparing or coordinating the preparation of the content
- creating all graphics
- formatting and laying out the document
- coordinating technical reviews
- final document preparation, publishing and distribution