Under general supervision, performs the most complex and varied technical support and training on use of personal computers, peripheral equipment, and systems hardware and software; provides technical depth and expertise with the ability to work directly with the customer; regularly leads large-scale or several small-scale projects of critical importance and substantial consequence of success or failure to the City; resolves computer application problems and troubleshoots hardware malfunctions; leads and assists in maintaining and administering operating systems; provides technical support, installation, and maintenance for software, desktop computer applications, virtual desktops, Internet/Intranet, and Citywide systems and servers; installs, configures, and repairs personal computer hardware and software systems; leads, trains, oversees, sets priorities, and allocate support requests to co-workers; and performs related duties, as assigned. Provides specialized and complex technical support and assistance to staff concerning personal and/or mobile computer systems; serves as the primary contact for and resolves related issues, conflicts, and concerns; responds to inquiries and provides information concerning system operations, projects, malfunctions, equipment, upgrades, practices, procedures, and related software applications.