
Sigma’s client and project portfolios span six continents and numerous power generation asset types including waste-to-energy, fossil fuel-fired, hydroelectric, combined cycle, cogeneration, and nuclear. Sigma is also very active in renewable energy, especially wind, solar, geothermal and biomass power facilities. This experience does not stop at generation facilities. Sigma has also been actively involved with electrical transmission and distribution systems, district heating networks, water and wastewater treatment facilities and natural gas distribution systems, among others.
Industry Expertise

Client Base
With over 300 global clients, Sigma boasts 80% of its business from repeat customers across a vast swath of industry participants, including:
- Private Equity and Infrastructure Funds
- Financial Institutions
- Institutional Investors
- Utilities (Investor Owned, Cooperatives, Municipalities)
- Project Developers
- Strategics, IPP Owners & Operators
- Construction Companies
- Waste to Energy System Operators
- OEM’s and System Suppliers
- Industrials
- Institutionals (Education and Health)