Exhibit 99.1

NAVIGANT REPORTS FOURTH QUARTER AND FULL YEAR 2015

FINANCIAL RESULTS; PROVIDES INITIAL OUTLOOK FOR 2016

CHICAGO, February 11, 2016 – Navigant (NYSE: NCI) today announced financial results for the fourth quarter and full year ended December 31, 2015. The Company also introduced its business and financial outlook for 2016.

Financial Summary and Highlights:

Navigant reported fourth quarter 2015 RBR of $212.0 million, a 6% increase, nearly all organic, compared to $199.5 million for fourth quarter 2014. Total revenues increased 4% to $232.6 million for fourth quarter 2015 compared to $223.6 million for fourth quarter 2014. Net income from continuing operations for fourth quarter 2015 was $13.2 million, or $0.27 per share, compared to $12.3 million, or $0.25 per share, in the prior year quarter. Adjusted EPS was $0.28 for fourth quarter 2015, flat compared to fourth quarter 2014. Fourth quarter 2015 adjusted EBITDA was $30.9 million compared to $30.2 million for the same period in 2014.

RBR for full year 2015 increased 9% on a year-over-year basis, with more than half attributable to organic growth, to $833.8 million compared to $766.6 million for 2014. Total revenues for full year 2015 increased 7% on a year-over-year basis to $919.5 million compared to $859.6 million for full year 2014. Net income from continuing operations for full year 2015 was $60.3 million, or $1.23 per share, compared to a net loss from continuing operations of $36.9 million, or $0.76 per share, in 2014, which included a non-cash goodwill impairment of $122.0 million ($86.9 million or $1.78 per share on an after-tax basis) recorded in second quarter 2014. Adjusted EPS was $1.07 for full year 2015 compared to $1.02 for full year 2014. Full year 2015 adjusted EBITDA was $120.9 million compared to $116.2 million for the full year 2014. Increased general and administrative costs as well as higher non-cash depreciation and amortization expenses impacted year-over-year EPS growth.

“We are extremely pleased with our 2015 results which reflected strong organic revenue growth and meaningful impacts from our recent investments,” commented Julie Howard, Chairman and Chief Executive Officer. “The progress we made throughout the year demonstrated our ability to meet or exceed our financial targets while continuing to invest in the business. Looking ahead to 2016, we anticipate reaping benefits from the foundation we have built across each of our core businesses, which is expected to translate into greater top line and bottom line growth.”

Segment Financial Summary

Our Healthcare segment delivered an outstanding 2015 with revenue and profit growth as well as margin improvement. RBR for the segment increased 23% year-over-year for fourth quarter 2015 with 17% organic growth for the period. For the full year 2015, RBR for the segment was up 29% from 2014 with 13% organic growth. Strength was driven by increased demand in key consulting areas including provider performance improvement solutions, revenue cycle consulting, life sciences and regulatory work for governmental agencies. In addition, business process management services (full year acquisition impact as well as organic growth) contributed to the growth. Segment operating profit margin for fourth quarter 2015 increased to 31% compared to 27% in the same period 2014, and for full year 2015, segment operating profit margin improved to 32% compared to 29% in 2014.

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Energy segment RBR increased 7% for the fourth quarter 2015 and 9% for the full year 2015 compared to the equivalent periods in 2014, all of which represented organic growth. RBR growth for the quarter was driven by an increase in strategy and operations as well as market intelligence engagements, reflecting increased success from the segment’s key client accounts program. In addition, full year RBR growth also benefited from the impact of senior hires. Fourth quarter 2015 segment operating profit was flat compared to the same period of 2014, and for the full year 2015 increased 3% compared to 2014, as higher RBR was partially offset by higher compensation and benefits expenses.

The Disputes, Investigations & Economics segment RBR results for fourth quarter and full year 2015 were relatively flat compared to the same periods in 2014. For the full year, growth in global construction, healthcare and financial services disputes was largely offset by lower contributions from forensic investigations and economic consulting engagements. Segment operating profit was down 9% in fourth quarter 2015 and down 2% in full year 2015 compared to the respective periods of 2014, driven by higher costs to better align resources.

The Financial, Risk & Compliance segment RBR for fourth quarter 2015 decreased 9% compared to the prior year quarter and decreased 8% for full year 2015 compared to 2014, primarily reflecting the lower volume of work from an ongoing large financial institution client, partially offset by continued strength in anti-money laundering and other consumer finance compliance engagements. Segment operating profit margins for both the quarter and year returned to more typical levels while declining from prior year periods due to the impact of lower RBR.

Cash Flow

Free cash flow was $7.5 million for fourth quarter 2015 compared to $12.7 million for the same period in 2014. Full year 2015 free cash flow was $49.0 million compared to $72.4 million for 2014, reflecting increased capital expenditures and investments. Days Sales Outstanding (DSO) was 76 days as of December 31, 2015, up 7 days compared to December 31, 2014.

Bank debt was $173.7 million at December 31, 2015 compared to $109.8 million at December 31, 2014. Leverage (bank debt divided by trailing twelve month adjusted EBITDA) was 1.44 at December 31, 2015 compared to 0.94 at December 31, 2014. The increase was mainly due to additional borrowings to fund the McKinnis Consulting Services acquisition in December 2015.

Navigant repurchased 341,200 shares of common stock during fourth quarter 2015 at an aggregate cost of $5.8 million and an average cost of $17.04 per share. For the full year, the Company repurchased approximately 1.6 million shares at an aggregate cost of $24.0 million and an average cost of $15.12 per share. As of December 31, 2015, $88.1 million remained available under the Company’s share repurchase authorization.

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2016 Outlook

Navigant is introducing its 2016 financial outlook. Full year 2016 RBR is expected to range between $900 and $940 million while 2016 total revenues are estimated to be between $960 million and $1.01 billion. Adjusted EBITDA for full year 2016 is expected to range between $132 and $145 million and adjusted EPS for full year 2016 is estimated to be between $1.05 and $1.15.

Non-GAAP Financial Information and Key Operating Metrics

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.

As used in this press release, organic growth represents RBR adjusted to include the impact of acquisitions as if the Company owned them from the beginning of each comparable period and adjusted to exclude the impact of foreign currency exchange rate fluctuations. Our definition of organic growth may not be comparable to similarly titled metrics at other companies. Management believes that organic growth reflects the growth of our existing business and is, therefore, useful in analyzing the Company’s financial condition and results of operations.

Conference Call Details

Navigant will host a conference call to discuss the Company’s fourth quarter and full year quarter 2015 results at 10:00 a.m. Eastern Time (9:00 a.m. Central Time) on Thursday, February 11, 2016. The conference call may be accessed via the Navigant website (www.navigant.com/investor_relations) or by dialing 888.455.9733 (630.395.0358 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.

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 industries and clients facing transformational change and significant regulatory or legal pressures, the Firm primarily serves clients in the healthcare, energy and financial services markets. 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.

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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,” “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; 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; 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; professional liability; information security controls; potential legislative and regulatory changes; continued access to capital; 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 and elsewhere in the Company’s filings with the Securities and Exchange Commission (SEC), which are available on the SEC’s website or at www.navigant.com/investor_relations. 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.

For additional information contact:

Aaron Miles

Navigant Investor Relations

312.583.5820

aaron.miles@navigant.com

Megan Maupin

Navigant Corporate Communications

312.583.5703

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NAVIGANT CONSULTING, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF INCOME (LOSS)

(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 (3)

(In thousands, except per share data)

(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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