This justification approves a total shared capacity increase for the Electronic Security Systems (ESS) VII Multiple Award Task Order Contract (MATOC) from $675,000,000 to $1,125,513,013. The following vendors' contracts were modified to incorporate the additional capacity: Atlantic CommTech Corporation (Corp.) W912DY-22-D-0073 BCF Solutions, Incorporated (Inc.) W912DY-22-D-0074 Signet Technologies, Inc. / Convergint Federal W912DY-22-D-0075 Evigilant.com, Limited Liability Company (LLC) W912DY-22-D-0076 KBR Wyle Services, LLC W912DY-22-D-0077 M.C. Dean, Inc. W912DY-22-D-0078 PTSI Managed Services, Inc. W912DY-22-D-0087 SERCO, Inc. W912DY-22-D-0088 Siemens Government Technologies, Inc. W912DY-22-D-0089 Xator Corp. W912DY-22-D-0090 Alamo-Evergreen Joint Venture, LLC W912DY-22-D-0091 Chenega Security International, LLC W912DY-22-D-0092 GCS Versar Joint Venture W912DY-22-D-0093 Infotec Systems Corp. W912DY-22-D-0094 Integrated Security Solutions, Inc. W912DY-22-D-0095 LoCurrent Systems, LLC W912DY-22-D-0096 Low Voltage Wiring, Limited W912DY-22-D-0097 Minuteman Security Solutions, LLC W912DY-22-D-0098 Red Peak Technical Services, LLC W912DY-22-D-0099 SEI Group, Incorporated W912DY-22-D-0100 Security & Energy Technologies Corp. W912DY-22-D-0101 Johnson Controls Building Automation Systems, LLC W912DY-22-D-0103 InDyne, Inc. W912DY-22-D-0104