Lander is expected to advise the firm on technology progress and develop Netegrity's technology strategic direction.
Lander will report to Bill Bartow, who is vice president of engineering for the firm.
"We are very excited to be promoting Vadim to the CTO role," said Barry Bycoff, Netegrity chairman. "Vadim's demonstrated knowledge and experience in this market, position him for great success in this new role."
Lander joined Netegrity in 1996 as a senior software engineer.
Lander will replace Deepak Taneja, who has served as CTO for the past six years.