DHS Industrial Control Systems Capabilities Enhancement Act of 2018 This bill amends the Homeland Security Act of 2002 to expand the responsibilities of the National Cybersecurity and Communications Integration Center. The center must address the security of both information and operational technology, including industrial control systems and must identify and address threats and vulnerabilities to products and technologies intended for use in the automated control of critical infrastructure processes by: (1) leading efforts to identify and mitigate cybersecurity threats to industrial control systems; (2) maintaining cross-sector incident response capabilities to respond to cybersecurity incidents; (3) providing cybersecurity technical assistance to stakeholders; and (4) collecting, coordinating, and providing vulnerability information to the industrial control systems community.