Birleşim Group is a group company where Erde, which was established in 1978 and operates in the electrical contracting sector, and Birleşim Mühendislik, which was established in 2002 and carries out mechanical installation projects, combined their forces under one roof in 2014. Birleşim Group successfully undertakes the electromechanical contracting works of buildings serving different usage areas such as hospitals, industrial facilities, logistics storage, shopping malls, hotels, houses, offices and residences with its experienced technical staff.
It reflects the power of its experience to the buildings with the 87+ Business and Life Centers and Commercial Buildings, 46+ Hospitals, 28+ Shopping Malls and 23+ Hotel projects it has carried out to date.

It continues its activities with the vision of adding new ones to the numerous projects it has implemented, especially Turkey’s “Tallest Building,” “Largest Private Hospital,” “Largest State Hospital” and “Largest Congress Hotel” and realizing many more ENs.

Birleşim İnşaat, established within the Birleşim Group in 2002, undertakes the construction, renovation and renovation works of buildings such as residences, industrial facilities and business centers.

He founded Birleşim Yeşil Enerji in 2020 with the vision of adding a new one to the mechanical and electrical engineering group and construction fields in which he operates. Birleşim Yeşil Enerji A.Ş. – BYE, which provides services in the field of renewable energy, purchased the Edikli Solar Power Plants, Uluder Solar Power Plants and Gülbahar Solar Power Plants, all of which are licensed, respectively, and included them in the group companies. While it invested in Menekşe RES in the field of wind energy in 2023, in the same year, it added ZEN Energy to the energy group and commissioned solar power plants with a total installed power of 48 MWp in Burdur, Eskişehir, Kırıkkale, Kütahya, Isparta and Uşak.

With its Green Energy project, Birleşim shows its determination to invest in the renewable energy sector, thus contributing to the country’s economy and protecting the environment and nature by preventing carbon emissions.

As of 2023, Santral Enerji was added to the group as a subsidiary of Birleşim Mühendislik, and innovative and modern solar energy services were expanded.

Birleşim Group

Watch Birleşim Group Promotional Films

Mesut Altan

Mesut Altan graduated from Yıldız Technical University, Department of Mechanical Engineering in 1995. He worked as Project Coordinator at Cantes Klima between 1995-2002. In 2002, he left this company and became the founding partner of Birleşim Mühendislik AŞ, which produces mechanical system solutions.

İdris Çakır

İdris Çakır graduated from Istanbul Technical University, Department of Mechanical Engineering in 1992. İdris Çakır, who worked as Project Coordinator at Cantes Klima between 1995-2002, left this company in 2002 and became the founding partner of Birleşim Mühendislik AŞ, which produces mechanical system solutions.

Birleşim Group, by following the developing technologies with its expert staff; environmentally sensitive, ensuring customer satisfaction and employee safety, quality, occupational safety and environmental standards. In this direction, our company fulfills the requirements of ISO 9001-2015 Quality Management System, BS OHSAS 18001-2007 Occupational Health and Safety Management System and ISO 14001-2015 Environmental Management System in all fields of activity it serves.

Our Quality Policy

Our Environmental Policy

Occupational Health and Safety Policy

Birleşim Group, which changes and develops its service understanding in parallel with the developing technologies in the world and in Turkey, maintains its commitment to our basic principles regardless of the changing conditions in every field in which it operates.

Our Basic Principles

Sustainable Sites

20/26

Innovation

4/6

Materials & Resources

8/14

Water Efficiency

10/10

Regional Priority Loans

4/4

Indoor Environmental Quality

8/15

Energy & Atmosphere

10/35

Sustainable Sites

20/26

Water Efficiency

10/10

Innovation

4/6

Regional Priority Loans

4/4

Materials & Resources

8/14

Indoor Environmental Quality

8/15

Energy & Atmosphere

10/35

Leed Gold Certified Headquarters

Birleşim Group head office is the FIRST Leed Gold Certified Green Building located in Dudullu Organized Industrial Zone.

Located on 8.5 acres of land, the head office building has a total area of 11,000m2 and consists of two separate buildings: administrative offices and a warehouse facility.

The warehouse part consists of 6000m2 storage and shipment area, while the headquarters building consists of 5 meeting rooms, a training and seminar hall for 100 people, a dining hall for 100 people and offices.

In our office, which has Green Building status, rainwater collection and treatment system, gray water system, solar energy system, energy automation system according to daylight.

All materials selected and used are Leed Gold Certified products.

Birleşim Group Corporate Videos

Turkey's Unification Birleşim Engineering - Firsts and Best!

Birleşim Engineering Thanks!

Birleşim Engineering Commercial Film 2021

Prof. Dr. Feriha Öz Emergency Hospital Introduction

Prof. Dr. Feriha Öz Emergency Hospital

Başakşehir City Hospital started to serve!

Unification Group 2017 Annual Meeting

ERDE Engineering 40th Anniversary Movie

Unification Group Workshop 2017 - Kartepe

Unification Group 2016 Annual Meeting - 18.03.2017

Birleşim Group - Life Without Cancer Association - November 13, 2016 - 38th Vodafone Istanbul Marathon

Birleşim Group Dragon Fest 2016 - 2nd place in Turkey

Birleşim Group - Dragon Fest 2015 - 4th in Turkey

Birleşim Group Dragon Fest 2014 - 6th place in Turkey

Birleşim Group Promotional Film

Mesut Altan - Chairman of the Board of Directors

Mesut Altan graduated from Yıldız Technical University, Department of Mechanical Engineering in 1995. He worked as Project Coordinator at Cantes Klima between 1995-2002. In 2002, he left this company and became the founding partner of Birleşim Mühendislik AŞ, which produces mechanical system solutions.
In 2006, with the aim of establishing Birleşim Group companies, Birleşim İnşaat AŞ; In 2011, Birleşim Makina AŞ was added to the group companies.
In 2014, he signed a strategic partnership and acquired 100% shares of Erde Mühendislik, one of the leading companies in the electrical contracting sector, and turned it into an engineering company that produces electromechanical contracting solutions, which will be among the firsts in the sector together with Birleşim Mühendislik. In 2016, the Company opened the Ataşehir Park-Inn By Radisson Hotel and invested in the hotel management sector; in 2018, the Company added Toro Makina AŞ to its group companies and invested in the construction equipment sector.

As of 2020, Birleşim Yeşil Enerji AŞ- BYE, which started to serve in the field of renewable energy, has included Edikli SPP, Uluder SPP and Gülbahar SPP plants, all of which are licensed, respectively, under its roof. While realizing the Menekşe WPP investment in the field of wind energy, it added ZEN Energy to its energy group in 2023. With Zen Energy, solar power plants with a total installed capacity of 48 MWp were commissioned in Burdur, Eskişehir, Kırıkkale, Kütahya, Isparta and Uşak.
At the end of 2022, he acquired 70% of the shares of Solar Santral AŞ, which provides holistic services to its customers from project development stage to financing, from installation to operation of the power plant, for Solar Energy Based Electricity Generation Plants (SPP), and brought it to Birleşim Engineering subsidiary.
Mesut Altan continues to serve as the Chairman and Vice Chairman of the Board of Directors of Birleşim Mühendislik AŞ, Erde Mühendislik AŞ, Solar Santral AŞ, Birleşim Yeşil Enerji AŞ, Birleşim Makina AŞ and Birleşim İnşaat AŞ within Birleşim Group.

Idris Cakir Deputy Chairman of the Board of Directors

İdris Çakır graduated from Istanbul Technical University, Department of Mechanical Engineering in 1992. İdris Çakır, who worked as Project Coordinator at Cantes Klima between 1995-2002, left this company in 2002 and became the founding partner of Birleşim Mühendislik A.Ş., which produces mechanical system solutions.
In 2006, with the aim of establishing Birleşim Group companies, he added Birleşim İnşaat AŞ and Birleşim Makina AŞ to the group companies in 2011.

In 2014, the company entered into a strategic partnership and acquired 100% of the shares of Erde Mühendislik, one of the leading companies in the electrical contracting sector, and together with Birleşim Mühendislik, it became an engineering company that produces electromechanical contracting solutions, which will be among the firsts in the sector. He continues to serve as Chairman and Vice Chairman. He continues to serve as the Chairman and Vice Chairman of the Board of Directors of Birleşim Makina AŞ and Birleşim İnşaat AŞ.

2020 Birleşim Yeşil Enerji AŞ- BYE, which started to serve in the field of renewable energy as of 2020, has included Edikli SPP, Uluder SPP and Gülbahar SPP plants, all of which are licensed, respectively, under its roof. While realizing the Menekşe WPP investment in the field of wind energy, in 2023, ZEN Energy was added to the energy group. With Zen Energy, solar power plants with a total installed capacity of 48 MWp were commissioned in Burdur, Eskişehir, Kırıkkale, Kütahya, Isparta and Uşak.
At the end of 2022, he acquired 70% of the shares of Solar Santral AŞ, which provides holistic services to its customers from project development stage to financing, from installation to operation of the power plant, for Solar Energy Based Electricity Generation Power Plants (SPP), and brought it to Birleşim Engineering subsidiary.
İdris Çakır continues to serve as the Chairman and Vice Chairman of the Board of Directors of Birleşim Mühendislik AŞ, Erde Mühendislik AŞ, Solar Santral AŞ, Birleşim Yeşil Enerji AŞ, Birleşim Makina AŞ and Birleşim İnşaat AŞ companies within Birleşim Group. He is the Chairman and Vice Chairman of the Board of Directors of Birleşim Makina AŞ, Birleşim İnşaat AŞ.