Increase your performance with Walden

Yaka Energy

Walden Energy’s proud partner is Yaka Energy, a Tribally-owned  and controlled business focused on energy procurement and resale. The firm possesses the integrity, industry background and financial experience to implement complex energy commodity transactions. Yaka combines tribal expertise gained in the gasoline and diesel retail industry with over 60 years of combined industry experience in the energy marketing, trading, production, gathering and transportation business sectors. Business development efforts focus on expanding a portfolio of energy supply and sales contracts and continuously managing a fully-hedged commodity risk profile.


The firm's business objective is to supply Fortune 500 companies, government agencies, investor-owned utilities and municipalities with energy commodities and energy marketing services. Yaka Energy delivers personalized customer service by providing creative solutions wrapped in a value-added pricing structure. We focus on a long-term approach to business relationships. A core value is reliability in all transactions.


To do business with Yaka Energy contact Kristin Mackey at or Lyndsi Lewis at


RBL Renewable Biosystems

Renewable BioSystems is a green2 company in that we help solve two environmental problems by: 

(1) disposing of organic waste without creating harmful greenhouse gasses and  (2) creating an environmentally friendly renewable fuel source, and other valuable co-products.

RBL offers waste to energy solutions that benefit both our clients and the environment.

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Everest Sciences

Everest Sciences provides leading-edge solutions for Turbine Generator Inlet Cooling. The Everest Cycle delivers dense, cool air to your gas turbine inlet, allowing more power output with greater efficiency. Go to:

RPS Advisors

RPS Advisors, llc is a registered Women-owned business through the WBENC. RPS is unique to the renewable industry with its cumulative experience of experts from diverse backgrounds including public utility, wholesale power trading, origination, management consulting, integrated resource planning and bulk power transmission.  

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Cool Hard Hat 

The Cool Hard Hat is a revolutionary, patented, air-cooled hard hat for the construction, energy, oil & gas, midstream, transportation, sectors worldwide, meets OSHA and ANSI standards Intrinsically Safe. Go to: