"second in charge" is correct and can be used in written English.
You could use it to refer to a person's rank or position within an organization, such as, "Sally is the second in charge in the Accounting Department."
That person may have a judge, the second in charge, and then clerks and maybe translators.
It is rare for a second in charge to receive such high-level official attention.
Mr. Illingworth was then second in charge of what became the Lexus luxury car division.
She's second in charge of Paint, probably lying her butt off about which color is which.
My SNCOIC (staff non-commissioned officer in charge, second in charge of my team) is a gearhead much like myself.
The report lay the blame for the misinformation on the second in charge, Assistant Commissioner Andrew Hayman.
As FM05 noted, 'I think being a second in-charge or acting facility manager helps in that one gets to be exposed to some of the management responsibilities and challenges'.
Left fielder Todd Cunningham, who replaced Daniel Nava in the eighth inning, charged Cabrera's ninth-inning single and made a strong throw home to keep Eaton at third base.
He is now second-in-charge of economics and business studies at Central Foundation Boys' school in London.
In fact, along with elderly maternal great-uncles, who are often the households' second-in-charge, younger uncles are the pivotal male influence on children.
For many years he served as the low-profile but essential second-in-charge when the group was the most persistent and prominent legal voice fighting to enforce school integration and end Jim Crow laws in the South.
