Integrated Electrical Services (www.ies-co.com), (NASDAQ: IESC) and Andretti Autosport announced today that IndyCar driver Ryan Hunter-Reay will make an appearance at the WINDPOWER 2010 Conference and Exposition as part of the sponsorship agreement between the two companies.

INDIANAPOLIS and HOUSTON (May 20, 2010) - Integrated Electrical Services (www.ies-co.com), (NASDAQ: IESC) and Andretti Autosport announced today that IndyCar driver Ryan Hunter-Reay will make an appearance at the WINDPOWER 2010 Conference and Exposition as part of the sponsorship agreement between the two companies. IES is an associate sponsor and the official electrical contractor sponsor for Andretti Autosport.

Hunter-Reay drives the #37 IZOD car for Andretti Autosport and is a four-time Indy car race winner, 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, at the Dallas Convention Center, from noon until 2 p.m. on Tuesday, May 25, 2010.

"We are excited to have Ryan and the Andretti Autosport team join our renewable energy efforts at the wind conference this year," said Michael Caliel, president and chief executive officer of IES. "IES is delivering sustainable electrical and communications results for our wind energy clients through deep technical expertise and industry-leading safety performance. Likewise, the Andretti Autosport team shares our commitment to results, sustainability and safety. We are pleased to be able to give our clients an up-close look at one of the fastest, most exciting sports on earth."

IES, headquartered in Houston, Texas, will showcase its work on renewable energy solutions at the show in Dallas this week. After appearing at the show, Hunter-Reay will return to Indianapolis where he will seek to win the 94th edition of the Indy 500 on May 30, 2010. Hunter-Reay will then return to Texas the following week to run in the Firestone 550 at the Texas Motor Speedway on June 5, 2010.

"We're happy to have IES as a team sponsor and also a service provider," said team owner and champion driver Michael Andretti. "They have provided both commercial services at our main offices and residential services to team members. Their ability to design, build and maintain electrical and communications services is valuable in helping to enable the modern lives we lead. Like us, IES is committed to leading the field and winning the race."

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.

About Andretti Autosport
Based in Indianapolis, Ind., Andretti Autosport is led by racing legend Michael Andretti. Andretti Autosport, which is the winningest team in Indy Racing League history, fields multiple entries in the IZOD IndyCar Series. Andretti Autosport also campaigns multiple cars in the Firestone Indy Lights series in a joint venture with AFS Racing and two cars in the USF2000 National Championship. The company boasts three IZOD IndyCar Series championships (2004, 2005 and 2007), two Firestone Indy Lights titles (2008 and 2009) and has won the Indianapolis 500 twice (2005 and 2007). For more information, please visit www.andrettiautosport.com.


Media Contacts:

Edjuan Bailey
Integrated Electrical Services
713/860-8082, 713/865-0620 or
edjuan.bailey@ies-co.com
Booth 1605 at WINDPOWER 2010

Laura M. Pennino
Pennino and Partners for IES
281/286-9398, 713/419 1776 or
lp@penninoandpartners.com