Quantum Health announced that John Hallock is joining its leadership team as Chief Communications Officer. In his new role, Hallock will lead the company's corporate communications function, including external and internal communications and investor relations. Hallock brings over two decades of experience designing and executing global communication programs for some of the nation's leading digital health and healthcare technology companies.

He most recently served as Chief Communications Officer at Transcarent. Before that, he was Senior Vice President of Corporate Communications at Livongo Health. In this role Hallock directed communications and investor relations through Livongo's 2019 IPO, which was the largest in consumer digital health industry history.

He also spearheaded Livongo's communications efforts for the company's $18.5 billion-dollar merger with Teladoc Health in 2020. Prior to Livongo, Hallock led corporate communications for athenahealth, Imprivata, and CareCloud. At athenahealth, he architected all facets of the company's communications programs, including its IPO, M&A activity, and media relations program.

At Imprivata, he helped execute the company's post-IPO national awareness programs and market repositioning as a leading healthcare security and patient identification company and led communications through the eventual acquisition by private equity firm Thoma Bravo.