Essi Sievers née Hallvar[1] (born 2 April 1983) is a Finnish retired ice hockey defenceman.

She played 91 international matches with the Finnish national team and won bronze at the 2011 IIHF Women's World Championship.

[2] Sivers began her career at age 16 with Oulun Kärpät in the Naisten SM-sarja, playing in all 26 of the 1999-2000 regular season games.

The Blues were Finnish Champions eight times during Sievers’ tenure, winning gold in 2003, 2004, 2005, 2007, 2008, 2009, 2013, and 2014; they won silver in 2010 and bronze in 2006.

For the 2010-11 season, Sievers played with the OSC Eisladies Berlin in the German Women's Ice Hockey League (DFEL), where she posted a career high average of 1.23 points per game.