Technical safety for
highly complex decisions.
We integrate engineering, contracts, schedules, costs, operations, and evidence to transform complex challenges into safer, more informed, and predictable decisions.
Speak with our partners.
Institutional
Engineering built on knowledge, responsibility, and trust.
Tetra do Sul is a boutique engineering firm specializing in providing highly complex technical support to organizations facing critical decisions in projects, contracts, disputes, and industrial operations.
Founded by four engineers with solid experience in large industrial projects, infrastructure, and contractual disputes, the company was born from the union of complementary skills around a shared vision: to understand each challenge in an integrated way, connecting engineering, contracts, schedules, costs, operations, and evidence.
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From the outset, we chose to maintain a lean structure. This decision preserves close relationships with clients, intellectual independence, and the direct involvement of partners in every project.
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We don't seek to compete on the volume of projects. We seek to be recognized for the depth of our analyses, the consistency of our recommendations, and the trust built in each decision.
Institutional
Engineering built on knowledge, responsibility, and trust.
Tetra do Sul is a boutique engineering firm specializing in providing highly complex technical support to organizations facing critical decisions in projects, contracts, disputes, and industrial operations.
Founded by four engineers with solid experience in large industrial projects, infrastructure, and contractual disputes, the company was born from the union of complementary skills around a shared vision: to understand each challenge in an integrated way, connecting engineering, contracts, schedules, costs, operations, and evidence.
From the outset, we chose to maintain a lean structure. This decision preserves close relationships with clients, intellectual independence, and the direct involvement of partners in every project.
We don't seek to compete on the volume of projects. We seek to be recognized for the depth of our analyses, the consistency of our recommendations, and the trust built in each decision.
R$ 1.6 billion+
in disputes attended by partners.
R$ 1.6 billion+
in disputes attended by partners.
Four engineers.
National and international operations.
Direct participation of partners in each project.
Areas of Expertise
Expertise for scenarios where engineering influences critical decisions.
Our work focuses on highly complex projects, contracts, disputes, and operations. Each project combines technical expertise, methodological rigor, and strategic vision.
Specialized technical support for arbitrations, construction litigation, and contractual disputes.
We integrate engineering expertise, forensic schedule analysis, impact assessment, contract review, and technical interpretation of evidence to build consistent and technically sound analyses.
Main activities
Technical support for arbitrations and litigation;
Forensic analysis of timelines;
Assessment of delays and impacts;
Contract review and interpretation;
Technical analysis of evidence;
Preparation of technical opinions and reports.
Strategic analysis of contracts, schedules, costs, and risks throughout the lifecycle of projects and ventures.
We connect technical, contractual, and financial information to understand causes, assess impacts, and support highly complex negotiations and decisions.
Main activities
Contract management and analysis;
Scope changes;
Delays and impacts on schedules;
Economic and financial rebalancing;
Claims and technical disputes;
Risk assessment and management.
Asset governance, maintenance, reliability, and operational performance improvement.
We analyze processes in an integrated way to identify risks, understand their causes, and develop recommendations aligned with the technical and managerial reality of each operation.
Main activities
Governance of industrial assets;
Maintenance management;
Operational reliability;
Maintenance contract management;
Technical diagnostics;
Process and performance improvement.
Areas of Expertise
Expertise for scenarios where engineering influences critical decisions.
Our work focuses on highly complex projects, contracts, disputes, and operations. Each project combines technical expertise, methodological rigor, and strategic vision.
Specialized technical support for arbitrations, construction litigation, and contractual disputes.
We integrate engineering knowledge, forensic schedule analysis, impact assessment, contract review, and technical interpretation of evidence to build consistent and technically sound analyses.
Main activities
Technical support for arbitrations and litigation;
Forensic analysis of timelines;
Assessment of delays and impacts;
Contract review and interpretation;
Technical analysis of evidence;
Preparation of technical opinions and reports.
Strategic analysis of contracts, schedules, costs, and risks throughout the lifecycle of projects and ventures.
We connect technical, contractual, and financial information to understand causes, assess impacts, and support highly complex negotiations and decisions.
Main activities
Contract management and analysis;
Scope changes;
Delays and impacts on schedules;
Economic and financial rebalancing;
Claims and technical disputes;
Risk assessment and management.
Asset governance, maintenance, reliability, and operational performance improvement.
We analyze processes in an integrated way to identify risks, understand their causes, and develop recommendations aligned with the technical and managerial reality of each operation.
Main activities
Governance of industrial assets;
Maintenance management;
Operational reliability;
Maintenance contract management;
Technical diagnostics;
Process and performance improvement.
Our Way of Working
Technical knowledge only generates value when applied responsibly and methodically.
Our methodology was built to understand complex challenges in a structured way, connecting technical, contractual, operational, and strategic factors.
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Throughout the entire process, the direct involvement of the partners ensures technical depth, close collaboration, and ongoing alignment with the client's objectives.
Our Way of Working
Technical knowledge only generates value when applied responsibly and methodically.
Our methodology was built to understand complex challenges in a structured way, connecting technical, contractual, operational, and strategic factors.
Throughout the entire process, the direct involvement of the partners ensures technical depth, close collaboration, and ongoing alignment with the client's objectives.
Who do we work for?
Specialized engineering for organizations that cannot make decisions based on fragmented analyses.
Law Offices
Technical support for arbitrations, construction litigation, and contractual disputes.
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Companies and Project Owners
Strategic analysis of contracts, schedules, costs, scope changes, and risks.
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Industrial Operations
Asset governance, maintenance, reliability, and operational performance improvement.
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International Market
Technical support for companies, investors, and international organizations with projects, assets, or disputes in Brazil.
Who do we work for?
Specialized engineering for organizations that cannot make decisions based on fragmented analyses.
Law Offices
Technical support for arbitrations, construction litigation, and contractual disputes.
​
Companies and Project Owners
Strategic analysis of contracts, schedules, costs, scope changes, and risks.
​
Industrial Operations
Asset governance, maintenance, reliability, and operational performance improvement.
​
International Market
Technical support for companies, investors, and international organizations with projects, assets, or disputes in Brazil.
Our Team
Four engineers.
An integrated vision.
“Tetra” represents the union of four engineers who decided to combine their experiences, knowledge, and professional backgrounds around a shared understanding of engineering.
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Each partner possesses their own unique expertise. It is the integration of these different perspectives that allows Tetra do Sul to analyze complex challenges in a systemic way and participate directly in the most relevant decisions of each project.
Diego Krieger
Co-Founder
Felipe Lengler
Co-Founder
Paulo Cortese
Co-Founder​