Zachary Carter, appointed as corporation counsel by Mayor Bill de Blasio, will take office by Feb. 1. Jeffrey Friedlander is acting corporation counsel in the interim.

Since 1995, Friedlander has been first assistant corporation counsel, which is the second-in-command post at the agency. He has been working in the Law Department since 1970. He also served as acting corporation counsel from November 1997 to March 1998 under then-Mayor Rudolph Giuliani. He is a Law Journal columnist, writing on Municipal Law.

In a statement, Friedlander, 66, said his goal during the interim period is “to maintain the smooth function of the office and to carry out all key responsibilities” in consultation with Carter. He called Carter an “excellent appointment” to lead the department.

Meanwhile, Carter, who lives in Westchester County, is establishing primary residency in New York City, which is required for the job. Carter is also finalizing his departure from his firm, Dorsey & Whitney, where he is a partner and cochair of the firm’s white-collar crime and civil fraud practice. His last day at Dorsey is Jan. 31, Carter told the Law Journal.

Before then, Carter said he is “winding down my private practice and coming up to speed” on Law Department issues through regular briefings.