When it comes to lending to tech startups, Silicon Valley Bank has an impressive grip on the market. The Santa Clara, Calif.-based institution has been in the D.C. area 15 years and claims half of the region's venture-backed companies as its clients. The bank, which has $21.5 billion in assets, has grown its Tysons Corner team by 25 percent in the past year to 10 people. I caught up with Megan Scheffel, who manages the bank's Mid-Atlantic and Southeastern U.S. regions.