Exhibit 99.1

Heidrick & Struggles Reports First Quarter 2011 Financial Results

CHICAGO (April 26, 2011) — Heidrick & Struggles International, Inc. (Nasdaq: HSII), the leadership advisory firm providing executive search and leadership consulting services worldwide, today announced financial results for its first quarter ended March 31, 2011.

Consolidated net revenue of $115.6 million increased 1.7 percent from $113.7 million in the 2010 first quarter. Year over year, net revenue increased 10.4 percent in the Americas, declined 16.0 percent in Europe (approximately 17 percent on a constant currency basis), and increased 5.3 percent in Asia Pacific (declined approximately 2 percent on a constant currency basis). Net revenue from Leadership Consulting Services increased 12.4 percent to $8.4 million and represented 7.3 percent of consolidated net revenue in the quarter.

The number of executive search and leadership consulting consultants at March 31, 2011 was 372, compared to 367 at March 31, 2010, and 347 at December 31, 2010. Productivity, as measured by annualized net revenue per consultant, was $1.3 million, compared to $1.2 million in the 2010 first quarter and $1.5 million in the 2010 fourth quarter. The number of executive search confirmations in the quarter decreased 1.6 percent compared to the 2010 first quarter, but increased 5.4 percent compared to the 2010 fourth quarter. The average revenue per executive search was $101,200 compared to $98,400 in the 2010 first quarter and $112,600 in the 2010 fourth quarter.

Consolidated salaries and employee benefits increased 6.3 percent to $88.4 million, from $83.1 million in the comparable quarter of 2010. The increase reflects higher fixed compensation expense including higher base compensation and payroll taxes associated with an 8.7 percent increase in employee headcount

and merit salary increases, an increase in deferred cash compensation, the amortization of special recognition awards issued in the 2010 second quarter, and severance expense, partially offset by a decline in stock-based compensation expense. Salaries and employee benefits were 76.4 percent of net revenue for the quarter, compared to 73.1 percent in the 2010 first quarter.

Consolidated general and administrative expenses increased 4.1 percent to $31.3 million from $30.1 million in the 2010 first quarter. The largest components of the increase relate to the continued investment in developing the company’s proprietary search system and the outsourcing of a portion of its information technology function. As a percentage of net revenue, consolidated general and administrative expenses were 27.1 percent, compared to 26.5 percent in the 2010 first quarter.

The operating loss in the quarter was $4.1 million compared to an operating loss of $3.8 million in the 2010 first quarter.

The net loss was $2.5 million and the net loss per share was $0.14, based upon an effective tax benefit rate in the quarter of 26.3 percent. In the 2010 first quarter, the net loss was $1.5 million and the net loss per share was $0.09, which reflected an effective tax benefit rate of 55.8 percent.

Net cash used in operating activities in the quarter was $80.2 million, compared to $32.2 million in the 2010 first quarter. Cash and cash equivalents at March 31, 2011 were $92.6 million compared to $81.2 million at March 31, 2010, and $181.1 million at December 31, 2010.

Chief Executive Officer L. Kevin Kelly said, “March confirmations were not as strong as we had projected, especially in the Financial Services practice, and this resulted in lower than anticipated revenue and operating margin in the first quarter. However, we are encouraged by April confirmations, which will be better than March, and do not believe that our first quarter results are indicative of what we believe is achievable in 2011. We expect confirmations to continue to improve as our new hires become more productive and market conditions

improve. We remain committed to our goals for reducing general & administrative expenses and are encouraged by the first quarter decline of $3.8 million compared to the 2010 fourth quarter.”

Regional Review

Totals and subtotals may not equal the sum of individual line items due to rounding.

The Americas reported a 10.4 percent year-over-year increase in first quarter net revenue driven by strong growth in the Industrial and Global Technology & Services practices. First quarter operating income increased 73.8 percent year-over-year, and the operating margin was 12.0 percent.

Europe’s first quarter year-over-year net revenue decline of 16.0 percent (approximately 17 percent on a constant currency basis) reflected weakness in the Financial Services Practice as well as the turnover of consultants in the second and third quarters of 2010 and new hires who are not yet fully productive. The operating loss was $2.1 million compared to an operating loss of $4.0 million in the 2010 first quarter. The 2010 first quarter operating loss of $4.0 million included $4.2 million of special charges.

The Asia Pacific region reported a 5.3 percent year-over-year increase in first quarter net revenue (approximately 2 percent decline on a constant currency

basis). Revenue increases in the Industrial, Consumer Markets, Life Sciences, Education & Social Enterprise and Global Technology & Services practices, as well as Leadership Consulting, were all but offset by a decline in the Financial Services practice. Operating income declined 23.5 percent and the operating margin was 10.3 percent.

Expenses related to Global Operations Support of $12.2 million increased from $7.5 million in the 2010 first quarter. The increase reflects professional services fees, severance, and search and corporate support previously provided primarily through the regions.

2011 Outlook

The company expects that 2011 second quarter net revenue will be between $126 million and $136 million and that the operating margin will be between 4 and 8 percent. The company is forecasting that 2011 net revenue and operating margin will be within its previously disclosed ranges of $515 million to $545 million for net revenue and 6 percent to 10 percent for operating margin. Net income and earnings per share in 2011 are expected to reflect a full-year effective tax rate of between 42 percent and 50 percent, but will be impacted by country-level results and tax planning initiatives.

Quarterly Conference Call

Executives of Heidrick & Struggles will host a conference call to review the first quarter 2011 results today, April 26, at 9:00 am Central Time. Participants may access the company’s call and supporting slides through the internet at www.heidrick.com. For those unable to participate on the live call, a webcast and copy of the slides will be archived at www.heidrick.com and available for up to 30 days following the investor call.

About Heidrick & Struggles International, Inc.

Heidrick & Struggles International, Inc., (Nasdaq:HSII) is the leadership advisory firm providing executive search and leadership consulting services, including succession planning, executive assessment, talent retention management, executive development, transition consulting for newly appointed executives, and M&A human capital integration consulting. For almost 60 years, we have focused on quality service and built strong leadership teams through our relationships with clients and individuals worldwide. Today, Heidrick & Struggles leadership experts operate from principal business centers around

the world. For more information about Heidrick & Struggles, please visit www.heidrick.com.

Safe Harbor Statement

This press release contains forward-looking statements. The forward-looking statements are based on current expectations, estimates, forecasts and projections about the industry in which we operate and management’s beliefs and assumptions. Forward-looking statements may be identified by the use of words such as “expects,” “anticipates,” “intends,” “plans,” “believes,” “seeks,” “estimates,” “projects,” “forecasts,” and similar expressions. Forward-looking statements are not guarantees of future performance and involve certain known and unknown risks, uncertainties and assumptions that are difficult to predict. Actual outcomes and results may differ materially from what is expressed, forecasted or implied in the forward-looking statements. Factors that may affect the outcome of the forward-looking statements include, among other things: our ability to attract and retain qualified executive search consultants; our ability to develop and maintain strong, long-term relationships with our clients; further declines in the global economy and our ability to execute successfully through business cycles; the timing, speed or robustness of any future economic recovery; social or political instability in markets where we operate; the impact of foreign currency exchange rate fluctuations; price competition; the ability to forecast, on a quarterly basis, variable compensation accruals that ultimately are determined based on the achievement of annual results; our ability to realize our tax losses; the timing of the establishment or reversal of valuation allowance on deferred tax assets; the mix of profit and loss by country; an impairment of our goodwill and other intangible assets; delays in the development and/or implementation of new or improved technology and systems; and the ability to align our cost structure and headcount with net revenue. Our reports filed with the U.S. Securities and Exchange Commission also include information on factors that may affect the outcome of forward-looking statements. We undertake no obligation to update publicly any forward-looking statements, whether as a result of new information, future events or otherwise.

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Contacts

Investors & Analysts:

Julie Creed, Vice President, Investor Relations & Real Estate:

+1 312 496 1774 or jcreed@heidrick.com

Media:

Wendi Taylor Nations, Senior Vice President, Chief Marketing Officer:

+1 312 496 1810 or wtaylornations@heidrick.com

Heidrick & Struggles International, Inc.

Consolidated Statements of Operations

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Segment Information

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Condensed Consolidated Balance Sheets

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Consolidated Statements of Cash Flows

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