About
An analyst-grade consulting team for the energy transition.
Sustains Energy is the energy vertical of Sustains.ai, focused on the engineering, economics, and policy of decarbonised power systems. We work where forecasts, grid physics, and capital decisions intersect.
Mission
Help energy leaders make decisions that hold up under audit.
The global energy system is being re-engineered in real time. Generation mix, market design, asset economics, and grid physics are all moving at once. Decisions made in this environment cannot rely on yesterday's heuristics or opaque vendor models.
We exist to close that gap. We pair classical power-system rigor with modern data tooling, and we put our methodology on the page. The result is analysis our clients can take to a regulator, a lender, or a board. And defend.
Principles
How we work.
A short list. We re-read it before every engagement.
Method transparency
Every deliverable names the model, the inputs, and the assumptions. No black boxes, clients should be able to defend the analysis to a regulator, a lender, or an investment committee.
Audit-grade rigor
Backtests, sensitivity analyses, and out-of-sample validation are non-negotiable. We benchmark forecasts against published indices and document deviations.
Domain over hype
AI is a tool, not a thesis. We use ARIMA where it wins, deep learning where it earns its compute, and classical power-system methods where physics is the answer.
Built for the transition
Our reference frame is a grid moving from synchronous to inverter-based, from base-load to flexibility-based, and from cost-plus tariffs to market-clearing prices.
Team
The people behind the analysis.
In consulting, the team is the product. These are the leads on Sustains Energy engagements.
Arjun Chandran Unni
Co-Founder & Senior Researcher
9+ years in energy analytics, power system studies, portfolio management, and technical research. PhD in Energy Portfolio Management, Asian Institute of Technology. Builds simulation-driven research and digital platforms for energy optimisation using Python, Django, FastAPI, and PostgreSQL.
Rohith C Unni
Co-Founder
Energy researcher focused on decarbonisation, sustainability, renewable energy, and policy analysis. Master's in Energy Policy, Planning & Economics, Asian Institute of Technology. Previously a consultant at PwC on energy & sustainability advisory engagements.
Reshma Suresh
Lead Engineer
10+ years in power systems and energy engineering. Master's in Power System Analysis. Hands-on with MATLAB, DIgSILENT PowerFactory, PyPSA, ETAP, and PSS®E across load-flow studies, grid analysis, simulation, and infrastructure planning.
Nitin
Head of Sales & Marketing
Renewable energy, capital markets, and business development across Southeast Asia, with experience at both early-stage ventures and listed companies. Drives client engagement, strategic partnerships, and commercial growth within the energy sector.
Aishwarya Raut
Sales & Marketing Lead
Business development, client success, and digital growth across AI, SaaS, and technology-driven businesses. Expertise in B2B relationship management, SEO-driven digital marketing, AI-enabled customer engagement, and commercial strategy.
Kiran Gautham
Software Engineer
Software development and AI-driven tooling for the energy sector. Contributes to energy-focused platforms and analytical systems. Python, web development, object-oriented programming, full-stack workflows.
Sreenidhi Harish
Software Developer
Software developer building digital products and tooling for the energy sector. Interests span web development, Python, and software engineering. Focuses on energy-focused platforms and analytical tools, with a bias toward continuous learning and collaborative problem-solving.
Engagement
Want our team on your next decision?
Tell us the question. We’ll tell you who from our team would lead it and what we’d bring.