弁護士をやとわないならば、やはり自分で一通りガイドブックと自分が申請する予定のVisa officeのVisa office instructionsに目を通すことを勧めます。とくにVisa office instructionsのチェックリストは、必要書類がすべてリストになっていますし。どのような内容がその書類に記されているべきかも書かれています。そのチェックリストを見るだけでも,日本でどんな書類を集めてくれば良いのか分かります。
取りあえず、職務経歴の項を抜粋しました。必要なのは職務経歴だけではないですよ!
http://www.cic.gc.ca/english/immigrate/skilled/application-regular.asp
Visa office instructions / Buffalo, U.S.A.
WORK EXPERIENCE
For you and your spouse or common-law partner:
• notarized employment contracts from your present and past employers,
accompanied by an English or French translation
• original and up-to-date letters of reference from your past and current employers.
Letters must be written on company letterhead and show the company’s full
address, telephone and fax numbers, and be stamped with the company’s official
seal.
Letters must include all of the following information:
• the specific period of your employment with the company
• the positions you have held during the period of employment and the time spent
in each position
• your main responsibilities in each position
• your total annual salary plus benefits
• the signature of your immediate supervisor or the personnel officer of the
company
• a business card of the person signing
If you cannot provide a reference from your current employer, provide a
written explanation.