Tannis was called to the bar after receiving a B.A. in Law with a concentration of Criminology and Criminal Justice from Carleton University and a J.D. from University of Ottawa. She practices in the areas of real estate, corporate/commercial, and estate planning. As a former Trustee for the Toronto Lawyers Association, Tannis has been involved in advocacy and education initiatives, most notably the moderator and presenter of continuing education programs and writer of articles for the TLA journal. She was previously on the education committee which is responsible for producing CPD programs for Toronto lawyers. She is also a member of the Condominium Sub-documents Committee of the Working Group on Lawyers and Real Estate which is responsible for producing province-wide precedent materials for lawyers to be used in condominium transactions. As of 2021, she sits on a mentoring sub-committee of the Working Group on Lawyers and Real Estate. Tannis is a frequent speaker and, in the past, has spoken on the issue of real estate, litigation and estate conveyancing/preservation of property, technology in real estate and ethics for the Ontario Bar Association, Law Society of Ontario, The Commons Institute and the Toronto Lawyers Association.​ For the last 7 years, Tannis has been focusing her research efforts on disruptions within real estate and has a particular interest in the sharing economy, innovations in affordable housing, and cryptocurrency and its relationship to real estate. In fact, legal fees can be paid in Bitcoin and Ethereum subject to the firm's cryptocurrency policy. ​Keeping current with technology is a significant part of the office's workflow. Real estate transactions were mostly paperless prior to the COVID-19 crisis and are now fully paperless with accomodations based on a client's specific need. As of August 2018, Tannis has been certified as a specialist in real estate law by the Law Society of Ontario. Personally, Tannis enjoys the hobby of photography and has competed in the sport of powerlifting.