Walker Advertising, LLC experienced a security incident between January 29 and February 22, 2018, where two senior employees' corporate email accounts were hacked. The attacker used these accounts to send phishing emails to solicit access credentials. Potentially compromised data includes names, Social Security numbers, driver's license numbers, medical information, and health insurance information. The company isolated accounts, locked out the hacker, reset credentials, enabled MFA, and offered one year of identity protection via Experian.