Integration with the project team
Engagement by project, technical work package, expert opinion, or ongoing support, aligned with the contracting firm's scope, schedule, and standards.
Independent technical consulting
Environmental consulting for aquatic environments.
Senior expertise in aquatic environmental studies, environmental numerical modeling, and emergency plans, working as an integrated part of consulting and engineering teams.
Partnership model
Integrated with the project team.
HP Gregorio takes responsibility for specific technical workstreams and works according to the contracting firm's scope, schedule, and standards, contributing to studies, reports, analyses, and technical review processes.
Direct involvement at every stage
HP Gregorio participates from method definition through execution, results analysis, preparation of technical deliverables, and project reviews.
Commercial neutrality and confidentiality
HP Gregorio protects the contracting firm's relationship with its end client, works discreetly, and does not compete for its account, position, or future scopes.
When to bring in HP Gregorio
On-demand expertise at critical stages of a project.
The engagement is sized to address the team's actual capability gap—without creating permanent overhead or expanding the scope beyond what is needed.
Expertise outside the permanent team
When a project requires a specific discipline that does not justify a permanent internal hire.
Peak demand or critical deadline
When the team needs to expand its capacity quickly without compromising technical consistency or predictability.
Complex technical review and defense
When methods, results, and uncertainties must be clear, traceable, and ready to withstand technical scrutiny.
Neutral and confidential partnership
When protecting the relationship with the end client is as important as adding technical depth.
Technical services
Areas of expertise.
Services may be engaged separately or combined according to project needs.
01 / CONSULTING
Environmental consulting for aquatic environments
- Environmental baselines, EIA/RIMA, and impact assessment
- Environmental monitoring plans and programs
- Data collection, processing, and critical analysis
- Water quality, sediments, and discharges
- Cartography, mapping, and management plans
- Expert opinions, reviews, and technical defense support
02 / MODELING
Environmental numerical modeling
- Hydrodynamics
- Water quality—near and far fields
- Effluent dispersion from submarine outfalls
- Oil and sediment dispersion
- Bathymetry and sediment transport
- Drilling fluids and cuttings
- Acoustic propagation modeling
03 / EMERGENCY
Environmental emergency plans
- Individual Emergency Plans and Area Plans
- Environmental risk analysis and management
- Spill scenarios and potentially affected areas
- Oil spill modeling for emergency planning
- Cartography and sensitivity mapping
- Technical support for reviews and emergency response
Industry sectors
Primary sectors.
The portfolio is concentrated primarily in the sectors below.
Oil, gas, and energy
Environmental studies, dispersion modeling, risk analysis, and emergency planning.
Ports, terminals, and shipbuilding
Permitting, monitoring, hydrodynamics, dredging, outfalls, risk, and emergency planning.
Water and sanitation, mining, and infrastructure
Water quality, discharges, reservoirs, sediments, and impact assessment.
Coastal management, conservation, and research
Management plans, environmental characterization, cartography, monitoring, and scientific studies.
About us
Leadership and technical team.
HP Gregorio is led by Helvio Prevelato Gregorio, an oceanographer with a PhD in Physical Oceanography, who participates directly in every deliverable and integrates with the contracting firm's teams. A network of specialized partners expands multidisciplinary capacity whenever the scope requires it.
- Environmental project experience since 2007
- Scientific training connected to consulting practice
- Direct communication, traceability, and critical analysis
PARALLEL TRACKS · 2007—2014
Academic training and professional practice in parallel.
Helvio completed his master's degree and PhD while working as a full-time member of environmental consulting teams.
Continuous professional practice
Senior Environmental Consultant · independent practice and HP Gregorio
Transition to independent environmental consulting and subsequent establishment of HP Gregorio, with technical responsibility for studies, modeling, monitoring, risk, and emergency planning.
FULL-TIME TEAM MEMBER · EXCLUSIVE ENGAGEMENT
Oceanographer · Hidromares, Consórcio Geohidroeco, and Mineral Engenharia
Worked exclusively within the consulting firms' technical teams on aquatic environmental studies, monitoring, and numerical modeling.
Academic background
IN PARALLEL WITH CONSULTING PRACTICE
PhD in Physical Oceanography · University of São Paulo
Thesis: Subinertial Oscillations in the South Brazil Bight: Numerical Studies (in Portuguese).
IN PARALLEL WITH CONSULTING PRACTICE
Master's Degree in Physical Oceanography · University of São Paulo
Dissertation: Numerical Modeling of Sewage Plume Dispersion for the Santos Outfall (in Portuguese).
Bachelor's Degree in Oceanography · University of São Paulo
Award for best undergraduate thesis: Study of Water Masses and Currents in Admiralty Bay, Antarctica, During Summer (in Portuguese).
Research, technology, and environmental projects
Featured projects.
HP Gregorio's technical portfolio and proprietary platforms.
Technical portfolio
All projects in a portfolio comprising more than one hundred assignments completed since 2007.
An HP Gregorio projectGUAECAST
Operational wave forecasting for the Baixada Santista region, São Sebastião, and Ubatuba.
An HP Gregorio projectRESSACAST
Operational forecasting of coastal storm-surge risk based on total water level and wave energy.
An HP Gregorio projectWHEN2BOARD
Historical analysis of oceanographic and atmospheric parameters for water sports and travel planning.
Technical partnership
Which specialized workstream needs to move forward in your project?
Share the project context, technical requirements, and schedule.