HOUSTON, Dec. 22, 2011 /PRNewswire/ -- Main Street Capital Corporation (NYSE: MAIN) ("Main Street") announced today that it has completed a new lower middle market portfolio investment totaling $9.0 million in invested capital. Main Street's investment in Willis Group, L.L.C. ("Willis Group" or the "Company") supported the Company's acquisition of Segula Technologies, Inc. ("Segula") and funded additional working capital needs of the Company. Segula provides information technology recruitment and personnel services to the healthcare, financial services, software and hardware development industries and to state governments. Main Street's investment consists of $9.0 million in first lien secured debt. Headquartered in Houston, Texas, Willis Group is a diversified provider of staffing and recruitment services through three specialized brands: Donovan & Watkins, Genuent, and Seis-Stream Global. Willis Group's portfolio of staffing solutions supports a large array of job functions and industries including Administrative, Clerical, Finance, Accounting, Legal, Information Technology, Energy, Manufacturing, and Construction. The Company also offers content management, document management, web content management, records management and project management through its Image Engine subsidiary. ABOUT MAIN STREET CAPITAL CORPORATION Main Street ( www.mainstcapital.com) is a principal investment firm that primarily provides long-term debt and equity capital to lower middle market companies. Main Street's lower middle market investments are made to support management buyouts, recapitalizations, growth financings and acquisitions of companies that operate in diverse industry sectors and generally have annual revenues ranging from $10 million to $100 million. Main Street seeks to partner with entrepreneurs, business owners and management teams and generally provides "one stop" financing alternatives within its lower middle market portfolio. Main Street also maintains a portfolio of privately placed, interest-bearing debt investments in middle market businesses that are generally larger in size than its lower middle market portfolio companies.