Exhibit 99.1

FOR IMMEDIATE RELEASE

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NAVIGANT REPORTS SECOND QUARTER 2017 FINANCIAL RESULTS

CHICAGO, July 31, 2017 – Navigant (NYSE: NCI) today announced financial results for the second quarter ended June 30, 2017.

Financial Summary and Highlights:

“Demand for our services in the second quarter was impacted by unexpected factors, some of which we have already begun to overcome, and others that will take more time to address,” stated Julie Howard, Navigant Chairman and CEO. “We experienced more conservative buying patterns than originally anticipated, leading to extended sales cycles and longer project conversion. We also believe the slowdown in demand for certain of our services was driven by legislative and regulatory uncertainty in the U.S. In response to these factors we implemented certain performance improvement actions both during and after the close of the quarter, including targeted staff reductions and other cost control measures.”

Howard further commented, “We are encouraged that we saw our overall performance improve over the course of the second quarter, and our pipeline of opportunities strengthen. We anticipate a stronger second half, primarily driven by continued organic growth in our Healthcare segment, and an improved backlog of work in our Financial Services and Compliance segment. However, we believe it is prudent to modestly adjust our guidance downward for the full year to reflect first half results, and our view of the uncertainties in the current demand environment.”

Navigant reported second quarter 2017 RBR of $235.2 million, a 1% decrease compared to $238.5 million for second quarter 2016. Total revenues decreased 2% to $256.8 million for second quarter 2017 compared to $261.7 million for second quarter 2016. Net income for second quarter 2017 was $8.8 million, or $0.18 per share, compared to $14.8 million, or $0.30 per share, in the prior year second quarter. Segment operating profit includes $3.3 million of severance expense. Additionally, severance expense of $1.1 million was incurred related to General & Administrative operations as Navigant executed against its plans to increase administrative efficiencies and implement business support improvements. Adjusted EPS was $0.24 for second quarter 2017, compared to $0.33 in second quarter 2016. Second quarter 2017 adjusted EBITDA was $29.2 million, a 21% decrease from $37.2 million for the same period in 2016.

Segment Financial Summary

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Healthcare segment RBR increased 5% for second quarter 2017 compared to the respective period in 2016, primarily on an organic basis. Segment RBR for the quarter also increased 4% sequentially from first quarter 2017. Growth was driven by continued demand from hospital systems for large, strategy-led transformation projects and demand from life sciences companies for commercialization solutions. The segment also experienced growth in managed services contracts, albeit at a lower rate than expected. Segment operating profit declined 4% in second quarter 2017 compared to the same period in 2016, primarily due to business mix.

Energy segment RBR increased 8% for second quarter 2017 on a year-over-year basis, led by contributions from the Ecofys acquisition announced in November 2016. The trend toward a cleaner, distributed, smarter energy infrastructure is driving change in traditional strategies and business models for Navigant’s energy clients. Growth in demand from commercial sector clients related to these energy transformation trends partially offset a decline in work for the U.S. federal government, as previously disclosed in the first quarter 2017. Segment operating profit increased 1% in second quarter 2017 compared to second quarter 2016.

Financial Services Advisory and Compliance segment RBR for second quarter 2017 decreased 16% compared to the prior year quarter, but increased 2% sequentially from first quarter 2017. As previously disclosed, growth in this segment was expected to decelerate in 2017, as compared to significant organic growth of 22% in full-year 2016, but not to the degree experienced in the second quarter. Throughout the quarter, conservative buying patterns for compliance services related to consumer financial services regulation continued to put revenue pressure on the segment. In contrast, the environment for financial crime related services remained strong. Segment pipeline improved over the course of the quarter and is expected to drive improved revenue performance in the segment for the second half of the year. Segment operating profit was down 30% in second quarter 2017 compared to the respective period in 2016, as resources and capabilities were maintained in anticipation of improving demand.

Disputes, Forensics & Legal Technology second quarter 2017 segment RBR decreased 5% year-over-year and 6% on a sequential basis from first quarter 2017. The decrease in RBR was driven by general weakness in commercial litigation opportunities and a delay in the start dates for certain engagements in the segment’s legal technology solutions business. Segment operating profit was down 26% in second quarter 2017 compared to the respective period of 2016, largely due to severance expense of $1.9 million which was recorded during the quarter.

Cash Flow

Net cash provided by operating activities for second quarter 2017 was $21.3 million compared to $34.2 million for second quarter 2016. Free cash flow decreased to $13.5 million for second quarter 2017 compared to $24.4 million for the same period in 2016, primarily driven by a $10.0 million earn-out payment related to the McKinnis acquisition which was paid during the second quarter of 2017. Days Sales Outstanding was 86 days as of June 30, 2017, up five days compared to December 31, 2016.

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Bank debt was $184.8 million at June 30, 2017, compared to $189.8 million at June 30, 2016 and $178.3 million at March 31, 2017, with the increase in bank debt primarily attributable to the previously mentioned McKinnis acquisition earn-out payment. Leverage (bank debt divided by trailing twelve month adjusted EBITDA) was 1.37 at June 30, 2017, compared to 1.46 at June 30, 2016 and 1.25 at March 31, 2017.

Navigant repurchased 436,122 shares of common stock during the second quarter 2017 at an aggregate cost of $9.0 million and an average cost of $20.62 per share.

2017 Outlook

Navigant adjusted its financial outlook for 2017. Full year 2017 RBR is expected to range between $955 million and $980 million while 2017 total revenues are estimated to be between $1.04 billion and $1.065 billion. Adjusted EBITDA for the full year 2017 is expected to range between $135 and $145 million and adjusted EPS for the full year 2017 is estimated to be between $1.19 and $1.29.

Non-GAAP Financial Information

This press release includes certain non-GAAP financial measures as defined by the Securities and Exchange Commission. Reconciliations of these non-GAAP financial measures to the most directly comparable financial measure calculated and presented in accordance with generally accepted accounting principles (GAAP) are included in the financial schedules attached to this press release. This information should be considered as supplemental in nature and not as a substitute for, or superior to, any measure of performance prepared in accordance with GAAP.

No reconciliation of Navigant’s 2017 adjusted EBITDA guidance and 2017 adjusted EPS guidance, both of which exclude the impact and tax-effected impact of severance expense and other operating costs (benefit), respectively, is included in the financial schedules attached to this press release. Navigant is not able to accurately forecast the excluded items at the level of precision that would be required to be included in the most directly comparable GAAP financial measure without unreasonable efforts.

Conference Call Details

Navigant will host a conference call to discuss the company’s second quarter 2017 results at 10 a.m. Eastern Time (9 a.m. Central Time) on Monday, July 31, 2017. The conference call may be accessed via the Navigant website (investors.navigant.com) or by dialing 800.988.9675 (415.228.4875 for international callers) and referencing pass code “NCI.” An archived version of the webcast will also be available via the Navigant website. A report of financial and related supplemental information is also available via the Navigant website.

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About Navigant

Navigant Consulting, Inc. (NYSE: NCI) is a specialized, global professional services firm that helps clients take control of their future. Navigant’s professionals apply deep industry knowledge, substantive technical expertise, and an enterprising approach to help clients build, manage, and/or protect their business interests. With a focus on markets and clients facing transformational change and significant regulatory or legal pressures, the firm primarily serves clients in the healthcare, energy, and financial services industries. Across a range of advisory, consulting, outsourcing, and technology/analytics services, Navigant’s practitioners bring sharp insight that pinpoints opportunities and delivers powerful results. More information about Navigant can be found at navigant.com.

Statements included in this press release which are not historical in nature are forward-looking statements as defined in the Private Securities Litigation Reform Act of 1995. Forward-looking statements may generally be identified by words such as “anticipate,” “believe,” “may,” “could,” “intend,” “estimate,” “expect,” “plan,” “outlook” and similar expressions. These statements are based upon management’s current expectations and speak only as of the date of this press release. The Company cautions readers that there may be events in the future that the Company is not able to accurately predict or control and the information contained in the forward-looking statements is inherently uncertain and subject to a number of risks that could cause actual results to differ materially from those contained in or implied by the forward-looking statements including, without limitation: the execution of the Company’s long-term growth objectives and margin improvement initiatives; risks inherent in international operations, including foreign currency fluctuations; ability to make acquisitions and divestitures; pace, timing and integration of acquisitions and separation of divestitures; operational risks associated with new or expanded service areas, including business process management services; impairments; changes in accounting standards or tax rates, laws or regulations; management of professional staff, including dependence on key personnel, recruiting, retention, attrition and the ability to successfully integrate new consultants into the Company’s practices; utilization rates; conflicts of interest; potential loss of clients or large engagements and the Company’s ability to attract new business; brand equity; competition; accurate pricing of engagements, particularly fixed fee and multi-year engagements; clients’ financial condition and their ability to make payments to the Company; risks inherent with litigation; higher risk client assignments; government contracting; professional liability; information security; the adequacy of our business, financial and information systems and technology; maintenance of effective internal controls; potential legislative and regulatory changes; continued and sufficient access to capital; compliance with covenants in our credit agreement; interest rate risk; and market and general economic and political conditions. Further information on these and other potential factors that could affect the Company’s financial results are included under the “Risk Factors” section of the Company’s Annual Report on Form 10-K for the year ended December 31, 2016, and elsewhere in the Company’s filings with the Securities and Exchange Commission (SEC), which are available on the SEC’s website or at investors.navigant.com. The Company cannot guarantee any future results, levels of activity, performance or achievement and undertakes no obligation to update any of its forward-looking statements.

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NAVIGANT CONSULTING, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF INCOME

(In thousands, except per share data(1))

(Unaudited)

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NAVIGANT CONSULTING, INC. AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS AND SELECTED DATA

(In thousands, except DSO data)

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NAVIGANT CONSULTING, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)

(Unaudited)

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NAVIGANT CONSULTING, INC. AND SUBSIDIARIES

RECONCILIATION OF NON-GAAP FINANCIAL MEASURES

(In thousands, except per share data and percentages)

(Unaudited)

This press release includes certain non-GAAP financial measures as defined by the Securities and Exchange Commission. Below are the reconciliations of these non-GAAP financial measures to the most directly comparable financial measure calculated and presented in accordance with generally accepted accounting principles (GAAP). This information should be considered as supplemental in nature and not as a substitute for, or superior to, any measure of performance prepared in accordance with GAAP. Management uses these non-GAAP financial measures in addition to GAAP financial measures to assess the Company’s operations and financial results and believes they are useful indicators of operating performance and the Company’s ability to generate cash flows from operations that are available for interest, debt service, taxes and capital expenditures. Investors should recognize that these non-GAAP financial measures may not be comparable to similarly-titled measures of other companies.

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Footnotes

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