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Welcome to Energy Exemplar

Welcome to Energy Exemplar

Consider the feather

Consider the feather

Our Team


Dr Glenn Drayton

Founder and Chief Software Designer

Glenn’s experience in power system modelling and economics spans over 25 years. His academic studies coincided with the deregulation of the New Zealand, Australian and Singapore power markets, and Glenn's work influenced the design of the energy-ancillary services co-optimization formulations in those markets. Glenn started Drayton Analytics (later renamed Energy Exemplar) in 1999 to produce a next-generation power market model based entirely on optimization, the result being PLEXOS. Glenn obtained his B.Sc.(Hons) in operations research, and Ph.D. in management science from the University of Canterbury, New Zealand. As Chief Software Designer, Glenn focuses on strategic concepts and developments and long-term product direction. He specializes in mathematical optimization applied to power system planning.

Our History


In 1999 Glenn Drayton founded Drayton Analytics in Adelaide, Australia. With a team of experts in operations research, and economics, the company developed the initial version of PLEXOS and released it in mid-2000. With its strong co-optimization and mathematical framework simulating energy markets could now be done with unprecedented accuracy and robustness using linear programming and integrated mid and short-term simulation phases.


In 2001 the company gained a significant presence in Europe. PLEXOS was adopted by the Irish SEM as the de facto ‘standard’ simulator because of its ability to reproduce the optimisation-based market clearing operation of the market, and its open, auditable solution methods.


In 2004 an office was opened in Sacramento, CA under the name PLEXOS Solutions. PLEXOS rapidly evolved into a leading-edge transmission model and featured in the redesign of the California power market. PLEXOS Solutions also offered a range of consulting and data services around the PLEXOS product.


In 2006 the company expanded to provide software and services throughout the Asia-Pacific region and into southern Africa. On 29th June, Energy Exemplar Pty Ltd was Registered and assumed the role and responsibilities of Drayton Analytics Pty Ltd.


In June 2009, Energy Exemplar opened its 2nd regional office located in London and expanded the distribution, support, implementation and consulting roles for the PLEXOS product in the European region.


From January 2011, Energy Exemplar offered distribution, support, implementation and consulting roles for the PLEXOS product in the South American region. On the 5th August, Energy Exemplar acquired PLEXOS Solutions and expanded into the US market opening its 3rd regional office located in Roseville, California.


On April 1 2013 the company opened its 4th regional office located in Hartford, CT to support customers in the eastern interconnected system. On July 1, Energy Exemplar released a significant update to the PLEXOS software, introducing a fully integrated gas-electric co-optimisation with the availability of a commercial dataset making PLEXOS a truly powerful integrated energy simulation software. In August, Energy Exemplar became an ISO 9001:2008 certified company.


On April 1 2014, Energy Exemplar opened its 5th regional office, located in Johannesburg, South Africa to support customers in the African region.


In January 2015, installations of PLEXOS reached the 1000 milestone making it the most widely used commercial integrated energy market software in the world.


Riverside acquired Energy Exemplar in September 2017.


Energy Exemplar and US company EPIS, the makers of the Aurora simulation software, merge. The partnership creates the world's leading supplier of optimization-based simulation software.

Where Are We Located?

  • Australia - Head Office

    Energy Exemplar Pty Ltd

    Adelaide Australia

  • Roseville

    Energy Exemplar LLC

    Roseville USA

  • Columbus

    Energy Exemplar LLC

    Worthington USA

  • Europe

    Energy Exemplar (Europe) Ltd

    London UK

  • Sandpoint

    Energy Exemplar LLC

    Sandpoint USA

  • Salt Lake City

    Energy Exemplar LLC

    Salt Lake City USA

  • Tigard

    Energy Exemplar LLC

    Tigard USA

  • Latin America


    Latin America

  • Dubai

    Coming Soon

    Dubai United Arab Emirates

  • 1500 users
  • more than 300 sites
  • 52 countries
  • Clients
  • Offices

Since their first release in 2000 Energy Exemplar software has emerged as the tool suite of choice, with a customer base spanning the globe and including many of the world’s largest and most sophisticated utilities and system operators. Energy Exemplar's software simulation results are renowned for accuracy and robustness and have appeared in numerous publications. Their software simulation results are subject to regular and rigorous audit.

  • Power Generation Companies
  • Electricity and Gas Market Operators
  • Price Forecasting Agencies
  • Consultants
  • Transmission System Operators
  • Energy Commissioned Regulators
  • Power Plant Manufacturers
  • Analysts
  • Independent System Operators
  • Energy Traders
  • Power Plant Construction Companies
  • Academics & Research Institutions

The savings generated after investing in Plexos are many hundreds more than the initial outlay. It's a no-brainer.

Hendrick Heese Borusan EnBW Enerji

PLEXOS is our tool of choice for NEM market modelling. It gives us the flexibility to set up the model as we choose - and its scenario management is very sophisticated - allowing consistent assumptions to be applied to short, medium or long-term outlooks.

Ben Howard AGL

PLEXOS is a valued tool which provided CEZ with more insight into European power and carbon market dynamics. The analysis of fundamental drivers and their impact on the future balance of power systems is beneficial for both trading and investment purposes.

Zdenek Pekarek CEZ


  • Careers

Join Us

Energy Exemplar is always looking to hire talented people. If you have experience in this sector, we’d love to hear from you.

See job openings


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