Philip Hammond is expected to confirm 1,400 job losses in the Army but the Head of the Army said there will be no more "forced exodus".
The Defence Secretary has defended the use of unmanned aircrafts as the UK's drone nerve centre was revealed for the first time.
The Ministry of Defence has confirmed how much it has spent on the failed attempt to part-privatise its defence procurement arm.
Britain wants to impose sanctions on Russian President Vladimir Putin's "cronies" in response to the country's response over the MH17 air disaster, Philip Hammond said.
The new Foreign Secretary said: "The cronies of Mr Putin and his clique in the Kremlin are the people who have to bear the pressure.
"If the financial interests of the group around the leadership are affected, the leadership will know about it."
He added: "We are looking at individuals who contribute to, in one way or another, the regime in the Kremlin and its interference in Ukraine and Crimea or who have benefited from the decisions and actions of that regime."
The European Union will impose new sanctions on Russia over the country's role in the MH17 airplane crash, the Foreign Secretary said.
Philip Hammond said the sanctions were placed on Russia as "strong condemnation" for its role in the aftermath of the disaster which left 298 people dead.
He said: "We've agreed on concrete proposals to draw up lists of additional people subject to sanctions and to do so in the next couple of days.
"[We are also] looking at broader ranging sanctions, including arms embargoes, access to capital markets, financial services and hi-tech goods including for the energy sector".
He added that Britain wanted "cronies" around Russian President Vladimir Putin to bear the pressure of the fresh sanctions.
New Foreign Secretary Philip Hammond has insisted he will not be "threatening" other EU states as the UK seeks to renegotiate its position in the bloc.
Mr Hammond is seen as a more eurosceptic voice than his predecessor, William Hague.
"I'm going to focus on making sure that we have a successful renegotiation with our European partners," he said.
"I don't think the way to enter a negotiation is to start issuing threats."
Defence Secretary Philip Hammond is to embark on a tour of Gulf states in a show of British support in the face of Isis's advances in Iraq.
Mr Hammond will meet ministers from of Saudi Arabia, the United Arab Emirates, Kuwait and Qatar during his two-day visit to the region starting tomorrow.
"The UK is deeply concerned by the recent developments in Iraq and the gains made by Isis.
"Although the UK is not planning a military intervention, we are committed to finding a long-term political solution," Mr Hammond said.
"We remain committed to the security of the Gulf, and want to reassure our friends and allies that we will do everything possible to support those who are working for a stable and democratic Iraqi state and to alleviate humanitarian suffering."
Defence secretary Philip Hammond has said that the UK will be "putting a small team" in the British Baghdad embassy, to increase awareness and help plan for possible emergency situations.
Mr Hammond also said that the British government will only give "technical advice" to Iraq at this stage, which will be delivered through either military or civilian methods.
The statement comes after increased sectarian violence in the north of Iraq by Islamic militants.
Defence Secretary Philip Hammond has said the government will give technical assistance to Iraq, but ultimately this is an "Iraq problem."
Mr Hammond, speaking at RAF Odiham in Hampshire said:
– Defence Secretary Philip Hammond
We are going to give all the support we can to the Iraqi government, technical support and advice.
But the Foreign Secretary has made it clear we don't have any intention of putting British boots on the ground.
This is an Iraqi problem and has to be solved in Iraq. But we'll provide all the assistance we can from a technical standpoint.
"All available search assets" are being used to find a British man missing in the Malaysian jungle, Defence Secretary Philip Hammond has been assured.
The Foreign Office said Mr Hammond, who has arrived in the country, was told Malaysian authorities would do everything possible to find 34-year-old Gareth Huntley.
An FCO spokesman said: "The Defence Secretary, who is in Malaysia, has spoken to the Malaysian Defence Minister this morning to confirm that all available search assets are used to find Gareth Huntley.
"The Government will continue to work with the Malaysian authorities to ensure there is a comprehensive search."
Malaysian defence minister Hishamuddin Hussein said he has spoken to Defence Secretary Philip Hammond about the search for a British man missing in the Malaysian jungle.
Mr Gareth Huntley, 34, from London, has not been seen since Tuesday morning when he went alone on a trek on Tioman Island.
An RAF Hercules aircraft is travelling to join the search for the four missing British yachtsmen, the Ministry of Defence has confirmed.
– MOD spokesperson
We can confirm that the UK will be providing military assistance in the search for the four British sailors.
A C130 Aircraft was deployed from RAF Brize Norton at 0500 on 21 May and has started to move towards the search area where it will join the international Search and Rescue effort.
Defence Secretary Philip Hammond said:
– Philip Hammond, Defence Secretary
The RAF's contribution to the search operation for the four missing British sailors will provide additional capability and resilience to the resumed search led by U.S. and Canadian forces.
We all hope that the extensive resources being provided by our allies and the further support from the UK can help locate the missing yachtsmen as soon as possible.
General Sir Peter Wall, who will lead the armed forces review into whether to lift the ban on women serving in combat roles, has said the key issue in determining the outcome would be the "delivery of operational effectiveness".
The review into whether to lift the bar on women joining the infantry and the Royal Armoured Corps was brought forward by Defence Secretary Philip Hammond.
The Ministry of Defence had been required to review its existing policy on the deployment of women by 2018 under EU equality laws.