From the team's press release:

The Washington Nationals today named Bryan Minniti Assistant General Manager and Jay Sartori Director of Baseball Operations. Nationals Senior Vice President and General Manager Mike Rizzo made the announcement.

Minniti joins the Nationals after spending the previous nine seasons with the Pittsburgh Pirates, the last two as their Director of Baseball Operations. With the Pirates, Minniti’s focuses included rules compliance, transactions, budgeting and contract negotiations. Minniti graduated from the University of Pittsburgh with a double major in Mathematics and Statistics.

Sartori worked for the Commissioner’s Office as Salary and Contract Administration Manager in Major League Baseball’s Labor Relations Department before accepting his position with the Nationals. His expertise included knowledge and interpretation of the Basic Agreement, contract language, salary arbitration and Rule 4 Draft bonus recommendations and analysis. Sartori graduated with a Finance and MIS degree from Boston College and is currently working on an MBA from the same institution.

 Two smart guys, huh?  Bringing on a couple of young numbers guys with good pedigrees in the department will allow Mike Rizzo to concentrate on what he knows best:  finding good baseball players.