Poland details espionage case involving long-serving Defense Ministry official

A Ministry of Defense employee with decades of access to classified material has been arrested in what Polish authorities describe as one of the most serious counterintelligence breaches in recent years.

Poland has disclosed new information about a Ministry of Defence employee accused of espionage, revealing that the suspect had access to highly sensitive and classified material over decades of service. The case, now under intense investigation, is being described by Polish authorities as one of the most serious counterintelligence breaches in recent years, according to PAP (Polska Agencja Prasowa).

The details were confirmed in an interview with the Polska Agencja Prasowa by Jarosław Strużyk, head of military counterintelligence, who stressed both the seniority of the suspect and the potential strategic impact of the case.

Decades inside Poland’s defence establishment

According to Strużyk, the detained official had been employed at the Polish Ministry of Defence since the early 1990s, a period spanning Poland’s transition from post-Cold War restructuring to full NATO integration.

“This official worked in the most important departments dealing with strategy, defence planning, and international security,” Strużyk said, underlining the scope of the employee’s responsibilities. The suspect also worked in “one of the most important” directorates of the Polish Armed Forces’ General Staff.

The role placed him close to the core of Poland’s defence decision-making. Over the years, he participated in numerous foreign business trips and professional meetings, interacting with thousands of individuals, including senior military officers and top government officials.

Access to classified data raises alarm

Strużyk confirmed that the suspect possessed in-depth knowledge of internal processes at the Ministry of Defence and had access to classified documents. The last formal counterintelligence vetting of the individual took place in 2021, a detail that is now drawing scrutiny as investigators assess how long the alleged espionage activity may have gone undetected.

When asked how long the employee may have been cooperating with foreign intelligence services, Strużyk said the timeframe remains under investigation. Authorities are currently examining what specific materials may have been passed on and, critically, what steps can be taken to reduce the operational value of that information.

Security officials see this damage control phase, often invisible to the public, as equally important as the arrest itself.

Counterintelligence calls arrest a major success

Despite the uncertainty surrounding the scale of the breach, Poland’s military counterintelligence leadership has framed the arrest as a clear success. Strużyk described the detainee as a “valuable” intelligence asset from a foreign perspective and warned against underestimating the importance of the case.

Such language is unusual in its directness and suggests that Polish authorities believe the espionage, if proven, may have had long-term implications for national and allied security.

The suspect was detained in early February inside the Ministry of Defence building itself, a detail that has added to the shock within Warsaw’s defence community. A court has ordered his detention for three months while the investigation continues.

Disinformation claims rejected

Strużyk also addressed statements from the Russian Federation accusing Poland of involvement in an alleged assassination attempt on a Russian general in Moscow. He dismissed these claims outright, calling them “typical disinformation”.

The remark reflects a broader pattern identified by Polish and allied intelligence services, where high-profile espionage cases are often followed by competing narratives and attempts to blur accountability.

Test for Poland’s security architecture

This comes at a time when Poland has positioned itself as a frontline state in NATO’s eastern defence posture, investing heavily in military modernisation and intelligence capabilities. An espionage case reaching this far into the defence establishment raises uncomfortable questions, even as officials emphasise the effectiveness of counterintelligence work.

For now, investigators are focused on reconstructing timelines, assessing exposure, and insulating sensitive systems from further risk. The full picture may take months to emerge, perhaps longer, but the message from Warsaw is already clear: this breach is being taken seriously and quietly, with no room for complacency.