Williamson was speaking in London to announce that the government is spending £50 million to develop a new chemical weapon defence centre at the Ministry of Defence's confidential laboratory, where the nerve agent used against Skripal and his daughter was identified.
He added however that threats from chemical weapons in different countries, not just Russian Federation, were "intensifying".
Williamson said the center would be based at the existing Porton Down facility, a secretive British army base which analyzed the nerve gas used to poison former double agent Sergei Skripal and his daughter Yulia in the city of Salisbury on March 4.
The government will also be offering the anthrax vaccine to "high-readiness forces" to provide them with protection against "deadly danger".
During a Q&A session after making a speech in Bristol, Gavin Williamson was asked if the world was facing a new cold war with Russian Federation in the wake of the Salisbury spy poisoning.
However, the Defence Secretary will use the Skripal poisoning to make clear the threat Russian Federation poses to Britain.
Anthrax is a spore-producing bacterium and is often used as a weapon in a powder, spray or as an aerosol - with inhalation the most risky form of transmission and usually fatal.
He said Britain had arrived at a "profound moment" in its history and said the country could not afford to "sit back and let events overtake us or step forward".
During his speech on Thursday, hosted by Policy Exchange and Rolls Royce in Bristol, Mr Williamson will also set out his vision for the ongoing Modernising Defence Programme. You see what they are doing in Syria, what they are doing in Ukraine.
This will mean taking intelligence, surveillance and reconnaissance capability "to the next level", and "accelerating" the development of specialist Army information unit, 77 Brigade, he will add.
Williamson was appointed defense secretary last November by Prime Minister Theresa May, replacing Sir Michael Fallon who resigned.