Cartesian SC 13D Management Network Group, Inc.

 Exhibit 99.1

Joint Filing Agreement

The undersigned agree that the foregoing Statement on Schedule 13D, dated March 7, 2014, is being filed with the Securities and Exchange Commission on behalf of each of the undersigned pursuant to Rule 13d-1(k).

Dated: March 7, 2014  

ELUTIONS, INC.

By:/s/ Christopher Voss

Name: Christopher Voss

Title: Chief Financial Officer

ENGAGE NETWORKS, INC.

By:/s/ Christopher Voss

Name: Christopher Voss

Title: Vice President, Secretary and Treasurer

ASTRA FAMILY HOLDINGS, LLC

By:/s/ Elizabeth Doucas

Name: Elizabeth Doucas

Title: Manager

LEVENTI IRREVOCABLE TRUST

By:/s/ Elizabeth Doucas

Name: Elizabeth Doucas

Title: Trustee

/s/ William Doucas

     William Doucas

/s/ Elizabeth Doucas

     Elizabeth Doucas