Collomb says his "constant efforts" will be to prevent some French youth from "falling into radicalization" and from perpetrating "the odious attacks we have known in recent years".
Collomb, a 69-year-old Socialist, has been a long-time mayor of Lyon. He served as defense minister under the previous president, François Hollande.
A newcomer to global diplomacy, Macron has assumed control of a nuclear power with a permanent seat on the U.N. Security Council as crises persist in Syria, Libya and North Korea.
Philippe was the expected choice for PM, though he was not well known in France until last week.
"I prefer the prime minister to come from my political family and not from the left", she said Tuesday on France Inter.
The government includes 18 ministers, half of them women and half men.
Macron appointed Philippe, a lawmaker from the moderate wing of The Republicans party, on Monday to head his first government in a move aimed at broadening his political appeal and weakening opponents before parliamentary elections in June.
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Macron will then be driven to the Arc de Triomphe to lay a wreath at the tomb of the unknown soldier.
Viard pointed out that the French society should be inspired by having a young centrist president and a prime minister not well-known in the political circles, adding that people would have a sentiment that Macron was "opening doors and windows closed before".
The biggest surprise was the appointment of television star and environmentalist Nicolas Hulot as ecology minister.
French President Emmanuel Macron arrives for talks with the German Chancellor, a day after the new French president took office, on May 15, 2017 at the Chancellery in Berlin.
The Republican Party, sent out a statement calling the cabinet "confusing".
In his busy first week, Macron is also set to meet EU Council President Donald Tusk in Paris later Wednesday as he tackles his top foreign priority of reforming the European Union.
As such, Mr Philippe could possibly attract other Republicans to Macron's cause, as the centrist president works to piece together a majority in parliament to pass his promised economic reforms.
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Another conservative Gerald Darmanin, was appointed budget minister. He was the first major Socialist politician to decide to back Macron's presidential bid.
Longtime Macron supporter and campaign manager Richard Ferrand was rewarded with the territorial cohesion portfolio.
Philippe is a member of the Les Républicains party and is close to Alain Juppé, the former Prime Minister who endorsed Macron after he won the first round of the presidential election. He was one of the Socialist government's most popular ministers.
The Defense Ministry may remain in the hands of Socialist Jean-Yves Le Drian to ensure continuity in French military operations against Islamic extremists in Syria, Iraq and Africa.
The new president's wife Brigitte, a 64-year-old who was his high school drama teacher, arrived separately for the ceremony wearing a light blue Louis Vuitton outfit.
The visit to Berlin continued a tradition of French presidents making their first foreign trip to Germany.
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