As a professional, she has boxed in the Jr. Flyweight, Flyweight, Jr. Bantamweight, Bantamweight and Featherweight divisions. Halmich has been the WIBF's world champion at the Jr. Flyweight, Flyweight and Super Flyweight division. Halmich made her professional debut on March 4, 1994, in her hometown of Karlsruhe, defeating Fienie Klee of the Netherlands.
Regina Halmich has defeated several quality boxers along her career. She defended her Flyweight title with success against Delia Gonzalez, Yvonne Caples and numerous others, once only with a draw against Elena Reid. She also faced Daisy Lang, against whom she won in a fight for the vacant IWBF world Super Flyweight title.
On January 15, 2005, she defeated Marylin Hernandez by a ten round unanimous decision defending the world Flyweight title. On April 16, 2005 she also defeated Hollie Dunaway in ten rounds defending her title. In her 50th professional fight, she has defended the title against Maria Jesus Rosa from Spain. She now holds the title for more than ten years. In December 2005 she won the rematch against Elena Reid.
On September 9, 2006 Halmich won her 53rd pro fight, defeating Ria Ramnarine of Trinidad and Tobago by TKO in the sixth round. Her pro boxing record now stands at 52 wins, 1 loss and 1 draw.
Halmich faced Reka Krempf of Hungary on January 13, 2007 at Halle, Germany's Brandberg Arena, defeating her by unanimous decision for the 44th successful title defense.
Retirement
Halmich announced her retirement after her farewell fight on November 30, 2007, in which she beat Hagar Finer (Israel) by majority decision (96-94, 97-94, 95-95).
