1968 -- Lionel Barthold, a manager of AC Transmission at General Electric with nearly two decades already at the company, tells his supervisor he'd like to manage a large business, either with GE or independently. He begins thinking about his own consulting firm.
1969 -- Barthold approaches GE colleagues Paul De Mello and Bob Ringlee about forming a new GE spinoff company and they agree to join him. Dale Hedman and Del Wilson also come aboard, as do Dag Reppen, Wayne B'Rells and Al Wood. Also joining the original seven men is Patricia Emmer, a longtime secretary at GE.
Aug. 4, 1969 -- Power Technologies, Inc. - the name was originally Power System Engineering -- opens its doors in the Finserv Building on Erie Boulevard, just south of its later location at 1482 Erie Blvd.
1970 -- PTI moves out of the Finserv Building and into the second floor of Trustco Bank at 265 State St. PTI had 11 employees at the time of the move and would add four more workers before the end of the year.
1972 -- PTI moves into an old American Locomotive Company building on Erie Boulevard and purchases its own computer, a Hewlett-Packard 2100, for $30,000.
1986 -- Barthold steps down as PTI president and is succeeded by Del Wilson, a principal engineer at PTI since 1974.
Aug. 1991 -- PTI announces plans to construct a new building across Erie Boulevard with a walkway connecting its new home to its ALCO location.
1993 -- Wilson retires and after a nationwide search, Bill Smith, who has worked in PTI's Florida office for two years, is selected to replace him in 1994.
Nov. 1994 -- Smith leaves PTI after 10 months, Wilson returns to resume his duties and is then succeeded in March of 1995 by Steven J. Balser, a PTI employee since 1976.
1995 -- PTI, which now has 120 employees in its Schenectady office, has more than 1,000 clients around the world and is doing business in 80 countries, including China, Korea, Indonesia and Thailand. The company's annual sales reach $20 million.
1999 -- PTI is sold to Stone & Webster of Boston, Massachusetts, and Dennis Aronson is named as president, replacing Balser.
2000 -- Stone & Webster files for bankruptcy and is purchased by the Shaw Group, Inc., an industrial piping company based in Baton Rouge, Louisiana.
January, 2005 -- Siemens Power Transmission & Distribution, a multinational business headquartered in Raleigh, North Carolina, purchases all the business activities of Shaw/PTI. Siemens says its purchase won't result in any substantial changes in the Schenectady company, and retains the PTI brand.
January, 2007 -- Siemens/PTI's software and educational seminars continue to become a major part of the business, with more than 1,000 engineers attending training sessions in Schenectady throughout the year. Siemens/PTI vice president and general manager Michael Edmonds tells The Gazette, "You will find a Schenectady solution in software throughout the world. A lot of us do a lot of international travel, performing software installation in 124 countries."
2009 -- Siemens/PTI moves into its new space at 400 State St. above the Bow Tie Cinema.
March, 2017 -- Scott Hulett, who worked for Siemens/PTI in Schenectady between 2007 and 2011, becomes the company's fourth general manager since the parent company's acquisition in 2005. PTI currently has roughly 40 employees in Schenectady, but has branches around the globe, and according to Hulett, "around 70 percent of the world's power grid runs on PTI software."