Office profile
Eni Headquarters & offices · Rome, Italy
Eni · Rome, Italy
A 1962 glass tower on Rome's EUR lake, planned as open floors divided only by cabinets 1.10 m high — the tallest building in the capital after St Peter's when it opened.
Palazzo Eni, the Morphosis campus near Milan, the welfare plan and seventy years of office history — then the business. Every number from Eni's own Form 20-F, eni.com, the architects and Italian public heritage records.
- 85.5 mheight of Palazzo Eni, inaugurated August 1962
- +20 daysof fully paid paternity leave on top of the statutory 10
- 0–6ages served by Eni's crèche and kindergarten in San Donato and Rome
- 32,349employees at the end of 2025
Sources: Eni Form 20-F 2025 · eni.com (careers/welfare, Eni's people, Diversity & Inclusion) · Italian Ministry of Culture, census of contemporary architecture (Palazzo ENI) · Morphosis project page
Companies / Italy / Energy / Eni
THE HEADQUARTERS · PALAZZO ENI · ROME EUR · 1962
A glass tower at the end of the EUR lake, built as open office floors
Palazzo Eni stands at the east end of the EUR lake, on axis with it, in Piazzale Enrico Mattei. Putting every function into one tall volume left the site free for traffic, parking and green space. A typical floor was laid out as open space divided only by rows of cabinets no higher than 1.10 m; only managers sat in small, fully glazed boxes. A bridge leads visitors straight to the first floor, while employees enter at ground level. The building held a 260-seat conference hall, a library and a bar and meeting rooms on the 19th floor, with the chairman's offices on the 20th. Outside it is a continuous aluminium-and-glass curtain wall between concrete end walls clad in travertine.
- 85.5 m · 20 floors + ground floor
- 1,200 m² floor plate (≈ 12,917 sq ft)
- Architects: Marco Bacigalupo & Ugo Ratti
- Structure: Leo Finzi & Edoardo Nova
- 260-seat conference hall
- Built 1959–1962
Palazzo Eni on the EUR lake
Palazzo Eni stands at the east end of the EUR lake in Piazzale Enrico Mattei, wrapped in an aluminium-and-glass curtain wall between concrete end walls clad in travertine.
The Morphosis campus in San Donato Milanese
Morphosis designed Eni's business center campus at Viale Alcide de Gasperi 2 — the Icon, Landmark and Skygarden towers joined by sky-bridges — built from 2018 to 2022.
Source: Italian Ministry of Culture, Censimento delle architetture italiane dal 1945 ad oggi, “Palazzo per gli uffici dell'ENI” (record 59). The layout describes the building as designed.
Eni's offices in Rome and San Donato Milanese
| Building | Address |
|---|---|
| Palazzo Eni (registered head office) | Piazzale Enrico Mattei 1, 00144 Rome, Italy |
| Branch office | Via Emilia 1, 20097 San Donato Milanese (Milan), Italy |
| Branch office · Primo Palazzo Uffici (1955–57) | Piazza Ezio Vanoni 1, 20097 San Donato Milanese (Milan), Italy |
| New business center campus (Morphosis, 2022) | Viale Alcide de Gasperi 2, 20097 San Donato Milanese (Milan), Italy |
Source: Form 20-F 2025 (registered head office and branch addresses) · Lombardia Beni Culturali, “Primo Palazzo SNAM” (Piazza Vanoni 1-2) · Morphosis project page (campus address) · See them on the map ↓
Source: Italian Ministry of Culture census of contemporary architecture (Palazzo ENI) · Morphosis project page “Exploration and Production Business Center” · Webuild project page “New Eni Headquarters” · Eni press release, December 2011 (Morphosis wins the competition)
Benefits (Italy, plus worldwide minimums)
On top of the statutory 10 days, fathers get 20 more working days at 100% pay, usable in pieces until the child is five months old.
Wherever local protection is lower, Eni guarantees at least 14 weeks of maternity leave at full pay (ILO Convention 183), since 2015.
“Nido scuola Eni 0-6” in San Donato Milanese and Rome, plus a contribution per child for crèche or babysitting until age 3.
Employees joining the Employee Share Ownership Plan (free share allocation) in 37 countries in 2024–2025; from 2026 it becomes a co-investment plan.
“Previeni con Eni”: cancer and cardiovascular screening tailored to age and gender, every two years, for employees in Italy.
A round-the-clock psychological counselling service for all Eni people in Italy, plus home and digital medical care for families (“Più Salute”).
Young hires who live far away get a service flat for their first three months; Eni also pays estate-agency fees for house hunting.
Summer holidays at the sea and in the mountains for children aged 6–14, and English-language camps for 15- and 16-year-olds.
Source: eni.com “Our Compensation & Welfare policies” (careers/welfare, 2026). Most programmes apply to employees in Italy; the maternity minimum applies worldwide.
How Eni looks after its people, in its own words
Remote work was introduced in 2017 and expanded in 2021; office and industrial-site staff in Italy can request it, plus flexible weekly and seasonal hours.
More than one million hours of training, run through Eni Corporate University with an internal faculty and university partners.
People hired on permanent contracts during the year.
In December 2025 Eni SpA obtained Gender Equality Certification under UNI/PdR 125:2022 and set up a Gender Equality Committee.
Share of senior managers, middle managers and graduates covered by performance assessment tools in 2025.
Source: eni.com careers/welfare (remote work) · careers/training · “Eni's people” (2025 figures)
Who works here
women working at Eni in Italy and abroad
of leadership roles (senior and middle managers) held by women
people in Refining and Chemicals, the largest segment
countries where Eni operates
Source: Form 20-F 2025, Item 6 (employees by segment and in/outside Italy) · eni.com Diversity & Inclusion (women, 2025) · eni.com (62 countries). Men's share calculated by eciffo as 100% minus 29%.
Office history: from a 1953 public agency to Rome's glass tower and a campus near Milan
- 1953 Ente Nazionale Idrocarburi is founded
Eni was created on February 10, 1953 by Law No. 136 as Ente Nazionale Idrocarburi, a public agency tasked with rebuilding Italy's energy policy under the guidance of Enrico Mattei. It is registered in the Rome Companies Register.
Source: Form 20-F 2025, Item 4 and Item 10 · eni.com “Our history”
No free-to-use photo found yet.Have one? We’d love to add it. - 1955–57 Metanopoli: the first Palazzo Uffici in San Donato Milanese
Marcello Nizzoli and Giuseppe Mario Olivieri designed the first office building at Piazza Vanoni as the representative seat of ENI's management, which still has offices there. Its tower rises 15 floors and 55 m on plans built from hexagons, behind a curtain wall of black-anodised aluminium panels; the lobby has a stone bas-relief by Pericle Fazzini.
Source: Lombardia Beni Culturali, “Primo Palazzo SNAM” · Eni Historical Archive, photo by Aldo Ballo (1961)
Metanopoli, first office building, 1961 · © Eni Historical Archive / Aldo Ballo (1961) - 1962 Palazzo Eni opens on the EUR lake in Rome
Built between 1959 and 1962 by Marco Bacigalupo and Ugo Ratti — chosen because they were already designing the company's Milan offices — the 85.5 m tower was inaugurated in August 1962. It became the seat of ENI and was the tallest building in Rome after St Peter's Basilica.
Source: Italian Ministry of Culture, census of contemporary architecture, “Palazzo per gli uffici dell'ENI”
Palazzo Eni under construction on the EUR lake, 1961 · Indeciso42 / Public domain · Wikimedia Commons - 1992 From public agency to Eni SpA
A law decree of July 1992 turned the agency into a joint stock company; on August 7, 1992 the shareholders' meeting named it Eni SpA. The registered head office remains Piazzale Enrico Mattei 1, Rome.
Source: Form 20-F 2025, Item 4
No free-to-use photo found yet.Have one? We’d love to add it. - 1995 Eni goes public
In 1995 Eni became a publicly traded company, the start of its path to a global energy company.
Source: eni.com “Our history”
No free-to-use photo found yet.Have one? We’d love to add it. - 2022 A Morphosis campus at San Donato Milanese
Morphosis won the international competition in December 2011. Its three towers on Viale Alcide de Gasperi, linked by sky-bridges around a central piazza and entered through a preserved historic Eni building, were built from 2018 to 2022. The registered head office stays in Rome.
Source: Morphosis project page · Webuild project page · Eni press release, December 2011 · Form 20-F 2025
No free-to-use photo found yet.Have one? We’d love to add it.
Map: how the headquarters moved
Two places, two cities. Eni's registered head office is Palazzo Eni on Rome's EUR lake, opened in 1962. Its branch offices are in San Donato Milanese near Milan, where Metanopoli's first office tower rose in the 1950s and the Morphosis campus was completed in 2022.
- 1 · 1955–57Primo Palazzo Uffici, Metanopoli — Piazza Vanoni, San Donato Milanese — first ENI office tower, by Nizzoli and Olivieri
- 2 · 2022Morphosis campus, San Donato Milanese — Viale Alcide de Gasperi 2 — three towers linked by sky-bridges
- 3 · 1962–todayPalazzo Eni, Rome EUR — Piazzale Enrico Mattei 1 — registered head office
Addresses: Form 20-F 2025 · Lombardia Beni Culturali · Morphosis project page. The 1953 founding address is not published, so it is not on the map.
What Eni does
Eni began in 1953 as Italy's state hydrocarbons agency. Today it calls itself an integrated energy company: it finds and produces oil and gas, trades gas and LNG, runs refineries and chemicals (Versalis), sells fuels and biofuels through Enilive, and sells renewable power and energy to homes through Plenitude.
Reporting segments: Exploration & Production; Global Gas & LNG Portfolio and Power; Refining and Chemicals; Enilive; Plenitude; Corporate and Other activities.
Where the money came from · Sales from operations by segment, 2025 (€ billions)
Source: Form 20-F 2025, notes to the consolidated financial statements (sales from operations by segment, 2025)
Source: Eni Form 20-F 2025, Item 5 (selected financial data and trading environment)
Growth: revenue vs. people
€66.9B → €82.2B
32,934 → 32,349
Calendar years, IFRS, € billions (Eni reports in euros). Sales from operations: SEC XBRL financial data from Eni's Form 20-F filings. Employees at December 31: Form 20-F 2019, 2022 and 2025. Multiples calculated by eciffo.
Chief executives
Joined Eni in 1981 as a reservoir engineer; Chief Executive Officer since May 2014.
Founded as Ente Nazionale Idrocarburi by Law No. 136 of February 10, 1953, under the guidance of Enrico Mattei.
Source: eni.com biography of Claudio Descalzi and “Our managers” · eni.com “Our history” · Form 20-F 2025
Eni: questions people ask
Where is Eni's headquarters?
Eni's registered head office is Palazzo Eni at Piazzale Enrico Mattei 1, 00144 Rome, in the EUR district. It also has two branch offices in San Donato Milanese near Milan, at Via Emilia 1 and Piazza Ezio Vanoni 1.
Source: Form 20-F 2025 · eni.com
Who designed Palazzo Eni in Rome?
Architects Marco Bacigalupo and Ugo Ratti, with structural engineers Leo Finzi and Edoardo Nova. It was built from 1959 to 1962 and inaugurated in August 1962.
Source: Italian Ministry of Culture, census of contemporary architecture
How tall is Palazzo Eni?
85.5 m, with 20 floors above the ground floor and two basements, on a 1,200 m² (≈ 12,917 sq ft) floor plate. When it opened it was the tallest building in Rome after St Peter's Basilica.
Source: Italian Ministry of Culture, census of contemporary architecture
What is Eni's new office campus in San Donato Milanese?
A campus of three towers linked by sky-bridges at Viale Alcide de Gasperi 2, designed by Morphosis and built by Webuild between 2018 and 2022. Morphosis gives its size as 73,826 m² (≈ 794,656 sq ft); Webuild says it holds 4,600 employees, a canteen for about 1,100 people and a 360-seat congress centre.
Source: Morphosis project page · Webuild project page
How many people work at Eni?
32,349 employees at December 31, 2025: 22,006 in Italy and 10,343 outside Italy. About 29% are women.
Source: Form 20-F 2025 · eni.com Diversity & Inclusion
Does Eni allow remote work?
Yes. Eni introduced remote work in 2017 and expanded it in 2021; employees in Italy who work in offices and industrial sites can ask to work from home, and remote work is being extended abroad in line with local rules. Flexible weekly and seasonal hours are also offered.
Source: eni.com careers/welfare
What parental leave does Eni offer?
Fathers get 20 working days at 100% pay on top of the statutory 10 days, until the child is five months old. Where local rules are lower, mothers get at least 14 weeks of maternity leave at full pay worldwide. Eni also runs crèches and kindergartens for ages 0–6 in San Donato Milanese and Rome.
Source: eni.com careers/welfare
What other benefits does Eni offer?
Free shares through the Employee Share Ownership Plan (over 26,000 participants in 37 countries), free cancer and heart screening every two years in Italy, 24/7 psychological counselling, supplementary pension and health plans, low-interest loans and summer holidays for employees' children.
Source: eni.com careers/welfare
Who is Eni's CEO?
Claudio Descalzi, Chief Executive Officer since May 2014. He joined Eni in 1981 as a reservoir engineer.
Source: eni.com biography
When was Eni founded?
On February 10, 1953, as Ente Nazionale Idrocarburi, a public agency led by Enrico Mattei. It became the joint stock company Eni SpA in 1992 and was listed in 1995.
Source: Form 20-F 2025 · eni.com “Our history”
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