Death? Pffft. 10 years isn't death,,,,
Good question and there's probably some confusion about this, so thanks for posting this Trevor. The Criminal Law and the Uniform Code of Military Justice are different. In the UCMJ, there's a death penalty as directed by a Court Martial, in the civilian world, the worst he's looking at is 10 years and a fine.
Here's the full text of the UCMJ Article and the Federal law as applicable to Civilians afterward, its long and full of legalese, just to warn you. The Civilian law's pretty short and much more to the point.
Article 106a - Espionage
(a)
(1) Any person subject to this chapter who, with intent or reason to believe that it is to be used to the injury of the United States or to the advantage of a foreign nation, communicates, delivers, or transmits, or attempts to communicate, deliver, or transmit, to any entity described in paragraph (2), either directly or indirectly, anything described in paragraph (3) shall be punished as a court-martial may direct, except that if the accused is found guilty of an offense that directly concerns (A) nuclear weaponry, military spacecraft or satellites, early warning systems, or other means of defense or retaliation against large scale attack, (B) war plans, (C) communications intelligence or cryptographic information, or (D) any other major weapons system or major element of defense strategy, the accused shall be punished by death or such other punishment as a court-martial may direct.
(2) An entity referred to in paragraph (1) is—
(A) a foreign government;
(B) a faction or party or military or naval force within a foreign country, whether recognized or unrecognized by the United States; or
(C) a representative, officer, agent, employee, subject, or citizen of such a government, faction, party, or force.
(3) A thing referred to in paragraph (1) is a document, writing, code book, signal book, sketch, photograph, photographic negative, blueprint, plan, map, model, note, instrument, appliance, or information relating to the national defense.
(b)
(1) No person may be sentenced by court-martial to suffer death for an offense under this section (article) unless—
(A) the m bers of the court-martial unanimously find at least one of the aggravating factors set out in subsection (c); and
(B) the members unanimously determine that any extenuating or mitigating circumstances are substantially outweighed by any aggravating circumstances, including the aggravating factors set out under subsection (c).
(2) Findings under this subsection may be based on— (A) evidence introduced on the issue of guilt or innocence; (B) evidence introduced during the sentencing proceeding; or
(C) all such evidence. (3) The accused shall be given broad latitude to present matters in extenuation and mitigation.
(c) A sentence of death may be adjudged by a court-martial for an offense under this section (article) only if the members unanimously find, beyond a reasonable doubt, one or more of the following aggravating factors:
(1) The accused has been convicted of another offense involving espionage or treason for which either a sentence of death or imprisonment for life was authorized by statute.
(2) In the commission of the offense, the accused knowingly created a grave risk of substantial damage to the national security.
(3) In the commission of the offense, the accused knowingly created a grave risk of death to another person.
(4) Any other factor that may be prescribed by the President by regulations under section 836 of this title (Article 36*)
The thing is that he's not in the Armed Forces, DoD employees and contractors are not subject to the UCMJ. They're subject to 18 U.S.C 798
18 U.S.C 798 - Disclosure of Classified Information
(a) Whoever knowingly and willfully communicates, furnishes, transmits, or otherwise makes available to an unauthorized person, or publishes, or uses in any manner prejudicial to the safety or interest of the United States or for the benefit of any foreign government to the detriment of the United States any classified information—
(1) concerning the nature, preparation, or use of any code, cipher, or cryptographic system of the United States or any foreign government; or
(2) concerning the design, construction, use, maintenance, or repair of any device, apparatus, or appliance used or prepared or planned for use by the United States or any foreign government for cryptographic or communication intelligence purposes; or
(3) concerning the communication intelligence activities of the United States or any foreign government; or
(4) obtained by the processes of communication intelligence from the communications of any foreign government, knowing the same to have been obtained by such processes—
Shall be fined under this title or imprisoned not more than ten years, or both.
(b) As used in subsection (a) of this section—
The term “classified information” means information which, at the time of a violation of this section, is, for reasons of national security, specifically designated by a United States Government Agency for limited or restricted dissemination or distribution;
The terms “code,” “cipher,” and “cryptographic system” include in their meanings, in addition to their usual meanings, any method of secret writing and any mechanical or electrical device or method used for the purpose of disguising or concealing the contents, significance, or meanings of communications;
The term “foreign government” includes in its meaning any person or persons acting or purporting to act for or on behalf of any faction, party, department, agency, bureau, or military force of or within a foreign country, or for or on behalf of any government or any person or persons purporting to act as a government within a foreign country, whether or not such government is recognized by the United States;
The term “communication intelligence” means all procedures and methods used in the interception of communications and the obtaining of information from such communications by other than the intended recipients;
The term “unauthorized person” means any person who, or agency which, is not authorized to receive information of the categories set forth in subsection (a) of this section, by the President, or by the head of a department or agency of the United States Government which is expressly designated by the President to engage in communication intelligence activities for the United States.
(c) Nothing in this section shall prohibit the furnishing, upon lawful demand, of information to any regularly constituted committee of the Senate or House of Representatives of the United States of America, or joint committee thereof.
(d)
(1) Any person convicted of a violation of this section shall forfeit to the United States irrespective of any provision of State law—
(A) any property constituting, or derived from, any proceeds the person obtained, directly or indirectly, as the result of such violation; and
(B) any of the person’s property used, or intended to be used, in any manner or part, to commit, or to facilitate the commission of, such violation.
(2) The court, in imposing sentence on a defendant for a conviction of a violation of this section, shall order that the defendant forfeit to the United States all property described in paragraph (1).
(3) Except as provided in paragraph (4), the provisions of subsections (b), (c), and (e) through (p) ofsection 413 of the Comprehensive Drug Abuse Prevention and Control Act of 1970 (21 U.S.C. 853 (b), (c), and (e)–(p)), shall apply to—
(A) property subject to forfeiture under this subsection;
(B) any seizure or disposition of such property; and
(C) any administrative or judicial proceeding in relation to such property,
if not inconsistent with this subsection.
(4) Notwithstanding section 524 (c) of title 28, there shall be deposited in the Crime Victims Fund established under section 1402 of the Victims of Crime Act of 1984 (42 U.S.C. 10601) all amounts from the forfeiture of property under this subsection remaining after the payment of expenses for forfeiture and sale authorized by law.
(5) As used in this subsection, the term “State” means any State of the United States, the District of Columbia, the Commonwealth of Puerto Rico, and any territory or possession of the United States.
*- In case you're wondering, Article 36 basically says the President can set procedures himself if he so chooses.