Integrated Electrical Services to Highlight its Renewable Energy Electrical Expertise at WINDPOWER

Houston, TX, UNITED STATES, May 20, 2010 – HOUSTON (May 20, 2010) – Integrated Electrical Services (www.ies-co.com), (NASDAQ: IESC) will showcase its renewable energy electrical and communications capabilities and experience at the WINDPOWER 2010 Conference and Exposition being held at the Dall

Houston, TX, UNITED STATES, May 20, 2010 – HOUSTON (May 20, 2010) – Integrated Electrical Services (www.ies-co.com), (NASDAQ: IESC) will showcase its renewable energy electrical and communications capabilities and experience at the WINDPOWER 2010 Conference and Exposition being held at the Dallas Convention Center May 23-26, 2010. The WINDPOWER 2010 Conference and Exposition is the premier wind energy event in North America, last year hosting more than 23,000 attendees and nearly 1,300 exhibitors. IES will be exhibiting in Booth #1605.


\\\"Our modern lives depend on the ready availability of energy from a variety of sources. Renewable power generation is increasing in importance and viability, and IES provides this industry with the structured project management and depth of knowledge of electrical systems and services to allow these new and sustainable technologies to reach the market safely and efficiently,\\\" said Michael Caliel, president and chief executive officer of IES.

One of the nation's largest electrical and communications contractors, IES has delivered safe and reliable services to thousands of customers nationwide, including dozens of wind, solar and LEED Certified projects.

"Our team members work with facility owners and operators, general contractors and other industry members to design, build and maintain the critical electrical and communications systems required for success of their projects," commented Caliel. "Our ability to operate nationwide ensures our customers have qualified experts available when and where needed."

IES and Andretti Autosport also announced that IndyCar champion Ryan Hunter-Reay will make an appearance at the event as part of the sponsorship agreement between the two companies. Hunter-Reay drives the IZOD #37 car for Andretti Autosport and is a four-time IndyCar race champion, most recently at the IZOD IndyCar Series Grand Prix of Long Beach race on April 18, 2010. Hunter-Reay will appear at the IES Booth, #1605, from noon until 2pm on Tuesday, May 25, 2010.

IES SAMPLE RENEWABLE PROJECTS

Notrees Wind Farm – Goldsmith, Texas (Wind Farm)
The project consisted of the development of a wind farm with 55 Vestas V82 WTG, a 34.5/138 KV collector substation and 6.4 miles of 138 KV transmission line.


Buffalo Bear Wind Farm – Fort Supply, OK (Wind Farm)
This wind farm project can generate up to 19 megawatts (MW) of power and was sold to Western Farmers Electric Coop under a long-term power purchase agreement.

Aldi Distribution Center – South Windsor, CT (Solar)
The project consisted of the deployment of over 2700 roof-mounted solar modules using a ballasted sun link racking system. The system was tied into a 500KW grid interactive inverted which back fed the distribution center.

Carrier Clinic – Belle Mead, NJ (Solar)
The project was a 1.8 MW utility scale ground mount installation of 25,086 FS-275 modules and Satcom inverters using H-Beam pilings and a fixed mount flex rack mounting system.

CSU – Bakersfield, CA (Solar)
The project consisted of a 1.1 MW carport solar installation that is part of CSU-Bakersfield's commitment of generating 30% of electricity through renewable sources.

Villa Trieste – Las Vegas, NV (Solar)
Villa Trieste is the first residential development in the Southwestern United States to provide as standard a combination of solar power, LEED certification, and Environments for Living (EFL) building methods.

ABOUT IES
IES is a leading national provider of electrical and communications contracting solutions for the commercial, industrial and residential markets. From office buildings to wind farms to housing developments, IES designs, builds and maintains electrical and communications systems for a diverse array of customers, projects and locations. For more information about IES, please visit www.ies-co.com.

Press Contact:
Edjuan Bailey
713-865-0620
edjuan.bailey@ies-co.com

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