TEPCO SYSTEMS develops and maintains software that helps energy-related services operate more efficiently. Their challenges are to maintain a cloud-based development environment that simplifies offshore development ensures security, including that for terminals with cloud access and avoid the burden of managing client certificates, etc. They chose F5 to overcome these challenges. They have implemented Open VPN and F5 BIG-IP Access Policy Manger (APM). The results of implementing F5 were secure environment, including that for terminals with cloud access, was made possible using BIG IP APM and public cloud, offshore development became easier, time required to prepare the development environment was shortened and the burden on development partners was also reduced and contributed to the increased security of access to Office 365 by employees.