lee 句寫得岩唔岩

We live in the present, not in the past.Hence in Professions,present tense should be used in this sentence.
"ABC Civil Engineering Company was established in 1997. We provide a wild range of services. These include site assesment,advisory services on Civil Engineering;training for our clients to enrich their skills in engineering and testing materials."

我會較支持003 Jenkin，直接用 including ..... i.e We provide a wide range of services including site assesment........
including 前面的 comma 亦可删除

2009 Justice LEE, Chu Ming 2013

ABC Civil Engineering Company was established in 1997 ( has been established since 1997).We provide a wide range of services. These include site assesment, advisory services on civil engineering, training for our clients to enrich their skills in engineering and testing materials."

Your writing is correct but it will be better if you change was......... to has been..... as the company is still existing.

如果只係講tense可以說冇用錯

但句子結構/句式來說...These include...這句(文法不妥)不用分開獨立寫而可以連句

"ABC Civil Engineering Company was established in 1997. We provide a wide range of services, including site assesment, advisory services on civil engineering, training for our clients to enrich their skills in engineering and testing materials."

Our ABC Civil Engineering Company was established in 1997 and we provide a wide range of services. That will include location survey, construction survey, advisory services on civil engineering, in addition to give training for our clients to enrich their knowledge and skills in engineering and testing materials."