Management Team

At the forefront of Tactus Technology’s success is a diverse team of leaders with a passion for improving and transforming user experience.

Perry Constantine
Over 30 years of successful track record in High Tech as Board Member & CEO. PNL responsibilities have exceeded $750M in yearly revenues. Two Successful IPOs, exceeding $700M. Three Successful Mergers, $270M. Founded successful businesses in: US, Canada, Korea and China. Raised over $150M in private equity.
Justin Virgili, Ph.D.
Vice President, Engineering
Dr. Justin Virgili is the Vice President of Engineering. Prior to joining Tactus, Dr. Virgili led and contributed to the development of novel polymeric materials at The Dow Chemical Company and holds a number of issued and pending patents. He received B.S. degrees in Chemical Engineering and Biology from Stanford University and his Ph.D. in Chemical Engineering from U.C. Berkeley.
Bobby Sabhlok
Vice President of World Wide Sales
Bobby Sabhlok joined Tactus Technology in May 2018 as Vice President of World Wide Sales. Bringing more than 25 years of Global experience in OEM Sales, Channel Development and Business Development. Prior, Bobby was at Lanner Electronics where he was Director of Business Development, Americas, Sabhlok has held several management positions at Savvius, ZNYX Networks, and Emulex–Intelligent Networking Division. Sabhlok has also served as vice president of Global Sales at NetCell Corporation, and Director of Global Channel sales at NVIDIA Corporation and Western Digital Corporation.
Brian Chan
Director of Operations
Brian Chan is Director of Business Operations for Tactus Technology. Brian has a diverse resume that’s rich with experience in technology, retail operations, account management, IT and healthcare. Before joining Tactus in 2015, he was the general manager and IT specialist for a busy Bay Area dental practice that prides itself on staying on top of new technology. In addition to managing vendor relations, payroll processing and bookkeeping for the practice, Brian led the transition to modern practice-management software that is now helping the team go to paperless charting for patients. Before that, Brian was the general manager of a small chain of Oakland-based cafes, for whom he managed staff, inventory, revenue tracking and daily operations for seven years. Prior to that, he spent four years working for Microsoft, first as a contractor working on national accounts for then-startup He later became a lead campaign coordinator for the company’s Link Exchange/bCentral, where he helped the national sales team through a difficult reorganization process. He was later promoted to regional campaign manager for MSN’s Europe, Middle East and Africa region, where he managed a team that fulfilled ad contracts across multiple international sites for MSN.
Dan Graville
Dan brings 35+ years of finance/accounting related experience most recently with privately held firms in the multiple Hi-Tech Sectors including Software, SaaS, Security, Telecom, Internet, Healthcare/IT, Semiconductor, and International, including VC/PE funding, merger, acquisition, divestiture and restructuring experience. Having raised $350M+ in equity and debt transactions. Past public company experience includes LSI Logic, DSC Communications, Granger Associates, Alumax and Liquid Air (Semiconductors/Telecom/Base Metals/Industrial Gases). Background and skills include internal audit, financial planning and analysis, cost accounting (standard, job, ABC), financial reporting (including international reporting), revenue recognition, treasury management, Sarbanes-Oxley, FAS123R and government contract and management accounting.


Perry Constantine, Chairman

Umesh Padval, Thomvest Board Member

Tiemin Zhao, IPV Board Member

Nobuyuki Kambe, PhD