Joseph Liberatore
Analyst · Macquarie
Thank you, Dave, and thanks to all of you for your interest in Kforce. I'm very pleased to see another strong quarter from our team, particularly one with success as broad-based as this one. With double-digit year-over-year revenue growth rates in Tech Flex, FA Flex and HIM Flex, collectively contributing Flex staffing revenues year-over-year increase of 18%.
Our actions in this new era of Kforce are continuing to drive results, and I'm proud of the team's execution in meeting the needs of our clients, consultants and employees in our newly aligned and agile infrastructure.
Tech Flex is our largest business unit, representing 63% of total firm revenues. Tech Flex revenues have grown 18.2% year-over-year. Overall, our key performance indicators for technology remain at high levels for job orders, external submittals and send-outs and starts have improved in April from Q1 levels. Candidate supply remains tight, particularly in skill sets such as Java, Epic, .NET, project and program management. We continue to see strong demand in our 2 largest industry verticals of financial services due to increasing regulatory and compliance needs, coupled with health care, our largest industry vertical, as hospitals and health care organizations implement systems and transition their platforms to more of a shared services model. However, the demand is broad-based as we've experienced recent gains in telecom, insurance and the computer services industries in particular. Inter-quarter trends for Tech Flex revenue showed typical declines in January from year-end assignment ends followed by improvement in February and a strong March as headcount recovered to December averages by late Q1.
Tech Flex revenue in headcount trends are well above levels from last year and improving starts volumes suggest we can expect Q2 Tech Flex revenues to be up on a billing day basis sequentially, and year-over-year growth to remain above 15%.
Revenues for our Finance and Accounting Flex business represent 18.7% of total revenues. Q1 revenues increased 2.8% sequentially, and 14.5% year-over-year. Contributing drivers to the year-over-year success we are experiencing are project revenue increases, which the NRC positions us to maximize, client diversification and expansion in healthcare. Revenue showed steady growth through Q1 and these levels have continued into April. Execution has been key to our success as we are benefiting from management investments made in this business over the past 2 years to capture market share.
KPI levels, particularly start volume, are strong and we expect Q2 FA Flex revenues to be up on a billing day basis, with year-over-year growth to remain around 15%. Revenue increases for the first quarter for our Tech and FA businesses were broad-based from a client size perspective. The revenue growth has been enhanced by significant growth in a few large clients. The gross margin profile of these large clients is slightly lower but the gross margin dollar growth, as well as the efficiencies of scale have contributed to our improvement in operating margins.
We have a diverse and high-quality client base. We have prioritized penetration of existing clients through refinement of territory management and allocation of resources entities to clients as key to our strategy. Our top 25 clients contributed 34% of total revenue, an improvement of 350 basis points year-over-year from 30.5% in Q1 2013. This focus is expected to increase our ability to service and delight our large customers, and enhance our ability to shift quickly as their needs change. This is further enabled by our National Recruiting Center and the allocation of a portion of those resources into the West Coast facility supporting our West Coast clients. We expect the mix of growth to be balanced across all client sizes in the second quarter.
HIM Flex revenues grew 12.4% sequentially, and year-over-year growth accelerated significantly to 25.3%. This space continues to be driven by prioritization of available spend towards projects such as ICD-10 and EMR implementations. The recent announcement of ICD-10 deadline extension through at least October 2015 will likely have a minor short-term impact, but expectations remain solid on the future in this space. Revenue trends improved throughout the first quarter, and despite the extension, we expect continuing billing day growth sequentially and year-over-year growth to remain above 20% in the second quarter.
Revenues for Kforce Government Solutions increased 5% sequentially and decreased 0.3% year-over-year. We were very pleased with this group's performance, as expected impacts from weather were materially made up prior to the end of the quarter. There remains continued uncertainty around funding levels of various Government program and the environment for Government services remains challenging. We anticipate revenues to be stable to slightly up in the second quarter.
Search revenues from direct placement and conversions decreased 17.1% sequentially, and decreased 15.7% year-over-year. Our objective is to meet the talent needs of our clients through whatever means they prefer and providing a meaningful capability to deliver resources through permanent placement will remain important in meeting those needs. However, our investment is heavily weighted in growing our Flex businesses, so investment in our Search business will be driven by teams obtaining productivities measures, warranting additional investments to fuel continued growth within these proven teams.
In Q1 2014, Search was 3.2% of total revenues versus 4.3% in Q1 last year. We expect Search as a percentage of total revenue to continue to decline, but be relatively stable from a dollar perspective as we move forward. However, the second quarter was typically stronger for Search than Q1. And as a result, we expect revenues to improve from Q1 levels.
Revenue-generating headcount in Q1 remained relatively flat sequentially, and increased 7.2% year-over-year, slightly below our 10% year-over-year target. As Dave mentioned, year-over-year revenue growth has now surpassed our headcount growth and this trend continued into Q1. We plan to continue to invest in headcount at these target year-over-year rates in order to sustain revenue growth. As operating margins improve and strong demand continues, we will also look to strategically accelerate investments in headcount where opportunities to further accelerate growth exist. Contributing to growth in overall headcount is continued low turnover in our most experienced, most productive tenure groups. Associate mix, however, remains highly weighted in a tenure range of less than 18 months. So overall, productivity levels have significant room to improve particularly in Tech Flex.
I'm pleased with our strong performance in the first quarter and believe that the solid foundation we have built has begun to spin the flywheel of success for 2014 and beyond. Our priorities continue to be evolving our premier partnership with our clients, striving to be the employer of choice for our consultants and employees, and supporting revenue enablement with an agile customer-centric infrastructure. I'll now turn the call over to Dave Kelly, Kforce's Chief Financial Officer, who will provide additional insights on operating trends and expectations. Dave?